300+ Science Words That Start With J – Complete List of J Science

Science Words Start With J are vocabulary terms from biology, physics, chemistry, and other scientific fields that begin with the letter J. These words include names of units like Joule, body parts like jejunum, and time periods like Jurassic. Science Words Start With J help students describe natural phenomena, living things, and physical processes.

You might think few science words start with J, but this list proves otherwise. Learning Science Words Start With J gives you an advantage on quizzes, spelling bees, and science fairs. Many students miss easy points simply because they never learned these useful J terms.

This collection includes over 300 Science Words Start With J from many science subjects. You will find easy words for beginners and hard words for advanced students. Each word comes with a short meaning so you can learn quickly without confusion.

Why Learn Science Words That Start With J?

Learning scientific words that start with J helps students do better on tests like the SAT, ACT, and AP exams. These words show up in science textbooks and classrooms across the USA.

Teachers can use this J science vocabulary to build better lessons. ESL learners grow their English skills faster when they learn science terminology starting with J. Writers and science enthusiasts will love having this science glossary J handy for quick reference.

Physics Science Words That Start With J

Here are scientific concepts starting with J from physics. These science definitions with J are short and easy to remember.

Joule – The SI unit of energy.
Joule meaning in science – Energy transferred when one newton moves one meter.
Jerk – The rate of change of acceleration.
Junction in physics – A point where two or more circuit paths meet.
Junction diode – A semiconductor device that lets current flow one way.
Josephson effect – Supercurrent flows across two superconductors separated by a thin insulator.
Joule-Thomson effect – Temperature change of a gas when it expands without doing work.
Johnson noise – Random electrical noise caused by thermal agitation of electrons.
Jacobian matrix – A matrix of all first-order partial derivatives.
Jet – A narrow, fast stream of fluid or gas.
Jitter – Small unwanted time shifts in a digital signal.
J-Pole antenna – A vertical omnidirectional antenna made of wire.
J-coupling – Magnetic interaction between nuclear spins in NMR spectroscopy.
Jounce – The fourth derivative of position with respect to time.
Joule’s Law – Heat produced in a wire is proportional to resistance and square of current.
Junction rule – Sum of currents entering a junction equals sum leaving.
Joule cycle – A thermodynamic cycle used in gas turbine engines.
Jerk limit – Maximum allowed change in acceleration in motion systems.
Joule equivalent – The mechanical equivalent of heat (4.184 joules per calorie).
Junction transistor – A transistor made of two p-n junctions back to back.
Jamin interferometer – An optical instrument that measures refractive index.
Joule balance – A device that measures the Planck constant.
Jansky – A unit of spectral flux density used in radio astronomy.
Jitter attenuation – Reduction of timing errors in digital signals.
Junction temperature – The hottest operating temperature inside a semiconductor device.

Chemistry Science Words That Start With J

This section covers science dictionary J words from chemistry. Add these science alphabet J terms to your study list.

Jarosite – A yellow-brown mineral made of potassium and iron sulfate.
Jadeite mineral – A rare pyroxene mineral used as a gemstone.
J-aggregate – A type of dye molecule arrangement with a narrow absorption band.
Jander’s method – A technique to measure particle size distribution in powders.
Jacobsite – A manganese iron oxide mineral found in metamorphic rocks.
Jasper – An opaque form of chalcedony quartz with colored bands.
Joule’s experiment – An experiment showing that heat and work are equivalent.
Juvabione – A compound from balsam fir that mimics insect juvenile hormone.
Juniperic acid – A natural organic acid found in juniper berries.
Jasmone – A fragrant organic compound found in jasmine oil.
Jervine – A toxic steroid alkaloid found in corn lilies.
Juglone – A natural herbicide produced by black walnut trees.
Jellification – The process of turning a colloid into a jelly.
Junction potential – Voltage difference at the boundary between two different electrolytes.
Jaffe reaction – A chemical test for creatinine using picric acid.
Jadite – A glassy man-made material used as a jade substitute.
Joule’s law of heating – Heat produced is proportional to resistance times current squared.
Jahn-Teller effect – Distortion of a molecule to remove electronic degeneracy.
Jasmonate – A plant hormone that regulates defense responses.
Jelly – A semi-solid colloid with water as the dispersed medium.
Jarlite – A rare fluoride mineral containing sodium and aluminum.
Jet black – The darkest black color from carbon-based pigments.
Joule per mole – An SI unit of energy per amount of substance.
Jesuit’s bark – Historical source of quinine for malaria treatment.
Junction chemistry – The study of interfaces between different chemical phases.

Biology Science Words That Start With J

Learn STEM words that start with J from biology. These scientific words that start with J are used in every life science class.

Jurassic period – A geologic time period when dinosaurs ruled the Earth.
Jejunum function – The middle part of the small intestine that absorbs nutrients.
Juxtaglomerular cells – Kidney cells that release renin to control blood pressure.
Jellyfish biology – A marine animal with a gelatinous bell-shaped body and tentacles.
Junction in biology – A connection between two cells or cell parts.
Juvenile organism – An animal or plant that is not yet fully mature.
Jaw – The bony framework of the mouth used for biting and chewing.
Junk DNA – Non-coding DNA that does not make proteins.
Jugular – A large vein in the neck that returns blood from the head.
Juvenile hormone – A hormone that keeps insect larvae in their immature state.
Jigsaw-puzzle cell – An irregularly shaped plant cell that fits tightly with neighbors.
J-shaped growth curve – Exponential population growth with no limiting factors.
Jack jumper ant – A venomous Australian ant that can cause allergic reactions.
Japanese encephalitis virus – A mosquito-borne virus that causes brain inflammation.
Jaborandi – A South American plant whose leaves contain pilocarpine.
Jerdon’s courser – A rare nocturnal bird found only in India.
Jujube – A small fruit tree also known as Chinese date.
Jointed – Having nodes or points where movement or branching occurs.
Jugum – A ridge or connecting structure in some insect wings.
Jawless fish – Primitive fish like lampreys and hagfish without jaws.
Jelly layer – The gelatinous coat around some animal eggs.
Jejunitis – Inflammation of the jejunum portion of the small intestine.
Juxtaposition – Side-by-side placement of different tissues or structures.
Juvenility – The early growth phase in plants before flowering begins.
Jaspilite – A banded iron formation used to study ancient bacteria.

Astronomy & Space Science Words That Start With J

Jupiter science facts and more are included here. These science terms beginning with J are for space lovers.

Jupiter – The largest planet in our solar system with a Great Red Spot.
Jovian planets – The gas giants Jupiter, Saturn, Uranus, and Neptune.
James Webb Space Telescope – NASA’s powerful infrared space observatory.
Jet stream definition – Narrow bands of fast wind in the upper atmosphere.
Jansky (Jy) – A unit for measuring radio wave intensity from space.
Jupiter’s Great Red Spot – A giant storm larger than Earth that has raged for centuries.
Juno spacecraft – A NASA mission currently orbiting Jupiter.
Jupiter’s moons – Over 79 natural satellites including Io, Europa, Ganymede, and Callisto.
J-type asteroid – A rare type of asteroid with basaltic composition.
Jarnac crater – An impact crater on the Moon.
Jeans instability – A condition where gas clouds collapse to form stars.
Jet propulsion – Thrust produced by expelling a high-speed jet of gas.
Jovian magnetosphere – Jupiter’s massive magnetic field region.
Jupiter’s rings – Faint rings made of dust from impact debris.
Janssen – A crater on Mars named after astronomer Pierre Janssen.
Jupiter’s auroras – Bright light displays near Jupiter’s poles.
JPL – Jet Propulsion Laboratory, NASA’s robotic space mission center.
Jansky’s discovery – Karl Jansky’s detection of radio waves from the Milky Way.
Jupiter’s atmosphere – Mainly hydrogen and helium with colorful cloud bands.
Jupiter’s temperature – Cloud top temperature around -145°C (-234°F).
Jupiter mass – A standard unit equal to 318 Earth masses.
Jupiter’s day – About 10 hours long, the shortest in the solar system.
Jupiter’s interior – Liquid metallic hydrogen layer surrounding a rocky core.
Jupiter’s orbit – Takes 11.86 Earth years to go around the Sun.
Jupiter trojans – Thousands of asteroids sharing Jupiter’s orbit around the Sun.

Earth & Environmental Science Words That Start With J

Jökulhlaup flooding is just one exciting term here. These science glossary J entries help with geology and ecology.

Jadeite mineral – A tough, green metamorphic rock used for carvings.
Jökulhlaup flooding – A sudden glacial outburst flood caused by volcanic melting.
Jet stream definition – Fast-moving upper-level winds that steer weather systems.
Joint – A natural crack in rock where no movement has occurred.
Jasper – A microcrystalline quartz used as a semiprecious gemstone.
Juglans – The walnut genus whose fossils help date ancient climates.
Jhor – A type of rapid landslide in loess soil deposits.
J-curve – An ecological graph of exponential population growth.
Juvenile water – Volcanic water that has never been part of the atmosphere.
Jar test – A water treatment test to find the best coagulant dose.
Jade – A general term for two minerals, nephrite and jadeite.
Jigsaw fit – How broken rocks fit together after a landslide.
Junction – A place where two or more streams meet.
Jellyfish bloom – A sudden rapid increase in jellyfish population.
Jasperoid – A silica-rich replacement rock often containing gold.
Joule’s equivalent – The amount of work needed to produce one calorie of heat.
Jura – A mountain range that gave its name to the Jurassic period.
Jelly roll structure – Folded rock layers that look like a rolled pastry.
Jungle – A dense tropical forest with tangled vegetation.
Jadeite jade – The rarer and harder type of jade from Myanmar.
Jet stream displacement – When the jet stream shifts north or south changing weather.
Jökull – The Icelandic word for glacier used in glacial geology.
Jasper Beach – A pebble beach made almost entirely of jasper stones.
Junction pH – The pH where two solutions meet in a soil profile.
Juglone toxicity – A natural poison from walnut trees that kills other plants.

Medical & Health Science Words That Start With J

These science definitions with J are critical for pre-med and nursing students. Learn science terminology starting with J for healthcare.

Juxtaglomerular cells – Kidney cells that release renin to raise blood pressure.
Jejunum function – Absorbs sugars, amino acids, and fatty acids in the gut.
Jaundice – Yellowing of skin and eyes from excess bilirubin in blood.
Jaw wiring – A surgery that fixes the jaw bones together for healing.
Jejunal atresia – A birth defect where part of the jejunum is blocked.
Jugular venous pressure – A measure of right heart function from neck vein height.
Jumper’s knee – Pain and inflammation of the patellar tendon.
Jaccoud’s arthropathy – A deforming but fixable arthritis from rheumatic fever.
Jacksonian seizure – A seizure that starts in one body part and spreads.
Jarcho-Levin syndrome – A rare genetic disorder with spine and rib defects.
Jaw thrust maneuver – A first aid technique to open a blocked airway.
Joint aspiration – Removing fluid from a joint with a needle for testing.
Joubert syndrome – A brain disorder affecting balance and coordination.
Juvenile idiopathic arthritis – Chronic joint inflammation in children.
Jod-Basedow phenomenon – Overactive thyroid caused by too much iodine.
Jarisch-Herxheimer reaction – Fever and chills after bacteria die from antibiotics.
Juvenile polyp – A benign growth in the colon of children.
Jejunostomy – A surgical opening into the jejunum for feeding.
Jugular notch – The dip at the top of the breastbone between the collarbones.
Jaw claudication – Jaw pain while chewing from temporal arteritis.
Junctional rhythm – A heart rhythm starting from the AV node instead of SA node.
Juvenile xanthogranuloma – A harmless skin bump in young children.
Jigsaw vertebra – A spine X-ray finding in Paget’s disease of bone.
Jaw reflex – A brisk upward jaw movement when tapping the chin.
Juxta-articular – Located next to a joint in the body.

Technology & Applied Science Words That Start With J

Jet propulsion and computing terms live here. These scientific concepts starting with J are used in engineering and tech.

Jet propulsion – Thrust created by expelling a fast-moving jet of fluid.
Junction diode – An electronic component that allows current to flow only one way.
Java – A popular programming language for web and mobile apps.
JavaScript – A scripting language that makes websites interactive.
Jupyter Notebook – An open-source web tool for creating live code and data.
Jig – A custom tool that guides or holds a workpiece during machining.
Joystick – An input device with a lever that controls movement in games or machines.
Joule thief – A simple boost converter circuit that lights LEDs from dead batteries.
JPEG – A common image file format that uses lossy compression.
JFET – A junction field-effect transistor that controls current with voltage.
Jig boring – A precision machining process for making accurate holes.
Jigsaw algorithm – A distributed computing method that splits tasks efficiently.
Jitter buffer – A memory space that smooths out packet arrival times in VoIP.
Jabber – An open communication protocol for instant messaging.
Jigsaw puzzle assembly – A robotics problem of fitting irregular pieces together.
Joule heating – Heat generated when electric current passes through a resistor.
Joint robotics – Robotic arms with rotating joints for movement.
Jamming – Deliberate interference with wireless signals.
JSP – Jakarta Server Pages, a technology for creating dynamic web pages.
Jumbo frame – An Ethernet packet larger than 1500 bytes for faster networks.
Jigsaw rendering – A way to render graphics in small square tiles.
Jog dial – A rotary knob for precise control of electronic devices.
Junction box – An enclosure that protects electrical connections.
Joule cycle engine – A gas turbine engine that runs on a constant pressure cycle.
Jigsaw debugging – Breaking a complex bug into smaller testable pieces.

Easy Science Words That Start With J (Beginner Level)

Young learners can start with these simple scientific words that start with J. Perfect for elementary and middle school students.

Jet – A fast stream of liquid or gas.
Jar – A glass container used in science experiments.
Jump – To push off the ground into the air.
Jelly – A soft, squishy colloid made of fruit juice and sugar.
Jaw – The bones in your mouth that hold your teeth.
Jigsaw – A puzzle where pieces fit together to make a picture.
Jolt – A sudden, quick movement or shock.
Juice – The liquid that comes from fruits or plants.
Jog – To run slowly for exercise.
Jack – A tool that lifts heavy objects.
Jamb – The side frame of a door or window.
Jingle – A short, ringing sound made by metal.
Jiggle – To shake or move in small, quick motions.
Jot – A tiny amount of something.
Jute – A plant fiber used to make rope and cloth.
Junk – Old or useless things that take up space.
Jellybean – A small bean-shaped candy used to teach color mixing.
Jogger – A person who runs for fitness.
Jigsaw blade – The cutting part of a jigsaw tool.
Jet pack – A backpack that shoots jets of gas to lift a person.
Jellyfish – A sea animal with a soft, bell-shaped body.
Jungle – A hot, wet forest with many trees and vines.
Jewel – A precious stone like a diamond or ruby.
Jockey – A person who rides horses in races.
Jelly roll – A cake rolled up with jelly inside.

Advanced & Technical Science Words That Start With J

These STEM words that start with J are for college students and researchers. Add these science alphabet J terms to your graduate school notes.

Jacobian matrix – All first-order partial derivatives arranged in a grid.
Jahn-Teller effect – Geometric distortion that removes degeneracy in molecules.
Jaynes-Cummings model – A quantum optics model of a two-level atom in a cavity.
Jeans length – The critical radius where a gas cloud collapses under gravity.
Jensen’s inequality – For convex functions, the function of the average is less than or equal to the average of the function.
J-matrix method – A technique for solving nuclear scattering problems.
Jost function – A complex function used in quantum scattering theory.
Jovanovic’s criterion – A soil liquefaction prediction method for earthquakes.
Jungian archetype – A universal symbol or pattern in evolutionary psychology.
Juxtacrine signaling – Cell-to-cell communication through direct membrane contact.
JAK-STAT pathway – A chain of signals from cell surface to nucleus controlling immunity.
Jablonski diagram – A graph showing molecular energy levels and light transitions.
J-integral – A fracture mechanics parameter that measures energy release rate.
Jansky noise – Low-level radio noise from the Milky Way galaxy.
Jitter transfer function – How a system passes timing jitter from input to output.
Joule-Kelvin coefficient – The rate of temperature change during gas expansion.
Josephson junction array – Multiple superconducting junctions used for voltage standards.
Jost-Lehmann-Dyson representation – A theorem in quantum field theory for commutators.
Jensen-Shannon divergence – A way to measure similarity between two probability distributions.
Jordan normal form – A block diagonal matrix form for linear operators.
Junction rule (Kirchhoff) – Conservation of charge at electrical nodes.
Jupiter’s synchrotron emission – Radio waves from electrons trapped in Jupiter’s magnetic field.
Juvabione analog – A synthetic compound that disrupts insect development.
Junction rectifier – A device that converts alternating current to direct current.
Jansky’s equation – The formula relating radio flux density to antenna temperature.

Zoology & Animal Science Words That Start With J

Animals have many strange and wonderful names. These science terms beginning with J help you name and understand them better.

Teachers and students will find these scientific words that start with J useful for biology class. Each word describes a real animal or animal body part.

Jaguar – A large spotted cat from South and Central America.
Jackal – A wild dog that lives in Africa and Asia.
Jabiru – A tall stork with a black head and white body.
Javan rhino – A very rare rhino species from Indonesia.
Jerboa – A small desert rodent with long back legs for jumping.
Japanese macaque – A snow monkey that lives in Japan.
Jellyfish – A sea animal with a bell-shaped body and stinging tentacles.
Junglefowl – A wild bird that is the ancestor of the chicken.
Jaguarundi – A small wild cat with a long body and short legs.
Jackrabbit – A North American hare with very long ears.
Jundiá – A type of catfish found in South American rivers.
Jaw muscle – The strong muscle that closes the mouth for biting.
Jointed leg – A leg with movable parts connected at joints.
Jawless fish – Primitive fish like lampreys that have no jaws.
Jigging – A fishing method where the lure is moved up and down.
Jaw plate – A hard surface in some fish used to crush food.
Jungle crow – A black crow species found in South Asia.
Jack mackerel – A fast-swimming fish found in warm seas.
Javan tiger – An extinct tiger subspecies from Indonesia.
Jaboticaba – A Brazilian tree whose fruit grows on the trunk.
Jewel beetle – A shiny, colorful beetle prized by collectors.
Jird – A small burrowing rodent from Africa and Asia.
Jungle cat – A medium-sized wild cat with tufted ears.
Japacu – A type of South American bird in the cuckoo family.
Jassid – A small leafhopper insect that damages crops.

Botany & Plant Science Words That Start With J

Plants are the lungs of our planet. These J science vocabulary terms help you name plant parts and species.

Gardeners and botany students will love this science glossary J. Each word describes something growing in the natural world.

Juniper – An evergreen shrub or tree that produces berries.
Jasmine – A climbing plant with sweet-smelling white flowers.
Jojoba – A desert shrub whose seeds make a liquid wax.
Jute – A tall plant whose stem fibers make rope and burlap.
Jicama – A Mexican vine with a crisp, edible root.
Jackfruit – A huge tropical fruit that can weigh over 50 pounds.
Juglans – The scientific name for walnut trees.
Japonica – A type of camellia or rice plant from Japan.
Jewelweed – A North American plant that soothes poison ivy rashes.
Jacob’s ladder – A garden flower with leaves like a ladder.
Jade plant – A succulent houseplant with thick, shiny leaves.
Jelly palm – A Brazilian palm tree with sweet, jelly-making fruit.
Job’s tears – A grass plant whose seeds look like teardrops.
Jaborandi – A South American shrub whose leaves cause sweating.
Jarilla – A desert plant that smells like lemon.
Juncus – The scientific name for rush plants that grow in wetlands.
Jatropha – A plant whose seeds make biofuel.
Jacobaea – A genus of flowering plants including ragwort.
Jelly ear fungus – A brown, jelly-like fungus that grows on elder trees.
Juniper berry – The small female cone of a juniper tree.
Jelly seed – A bad texture in mangoes where the flesh turns mushy.
Jamaican pepper – Another name for allspice berries.
Jambolan – An Indian tree with purple fruit used in medicine.
Japanese knotweed – An invasive plant with hollow bamboo-like stems.
Jelly plant – A succulent with jelly-like leaves.

Weather & Climate Science Words That Start With J

Weather affects everyone every day. These science definitions with J help you understand storms, wind, and climate.

Jet stream definition is just one important term here. Meteorology students will find these scientific concepts starting with J very helpful.

Jet stream – A narrow band of very fast wind high in the sky.
Joule – A unit of energy used to measure heat and work.
Jökulhlaup – A sudden flood from a glacier melting very fast.
Jupiter’s spot – A giant storm on Jupiter larger than Earth.
J-day – A day when forecasters predict freezing rain.
January thaw – A brief warm period during cold winter months.
Joule heating – Warming caused by electric current in the air.
Jet streak – A small area of extra fast wind inside a jet stream.
Junction – Where two different air masses meet.
Jigsaw precipitation – Rain that starts and stops in a patchy pattern.
J-angle – The tilt of a weather satellite’s viewing angle.
Joule cycle – A thermodynamic cycle used in weather modeling.
Jamaican winter – The dry season in the Caribbean from December to March.
Jet cloud – A wispy cloud formed by exhaust from a jet engine.
Jellyfish sprites – A type of electrical discharge above thunderstorms.
Jovian weather – The storm systems and clouds on Jupiter.
Jargon wind – A local name for a strong, cold wind in Alaska.
Junction temperature – The air temperature at a weather station junction box.
Jupiter’s magnetosphere – The magnetic field that shapes space weather near Jupiter.
Jigsaw fog – Fog that forms in separate patches instead of one blanket.
Joule storm – A solar storm measured in joules of energy.
June gloom – Morning low clouds along the California coast in early summer.
Jet entrance region – Where air accelerates into the fastest part of a jet stream.
Jupiter’s lightning – Powerful lightning bolts in Jupiter’s atmosphere.
Jökull wind – A cold wind blowing off an Icelandic glacier.

Neuroscience & Brain Science Words That Start With J

The brain is the most complex organ. These science terminology starting with J help you name brain parts and functions.

Psychology and pre-med students will use this science dictionary J for studying. Each term describes something about how we think and feel.

Jaw reflex – An automatic closing of the mouth when the chin is tapped.
Jerk nystagmus – Fast, uncontrolled eye movements in one direction.
Junction – Where one neuron connects to another neuron.
Juxtaglomerular cells – Brain cells near the kidney that sense blood pressure.
Jaw clenching – Tightening the jaw muscles from stress or anxiety.
Jactitation – Restless, jerky body movements during sleep.
Jigsaw puzzle test – A cognitive test that measures problem-solving.
Jitteriness – A feeling of nervousness and shaky movements.
Jaw opening reflex – Automatic mouth opening when you taste bitter food.
Junctional epilepsy – Seizures that start where nerves meet muscles.
Joubert syndrome – A genetic disorder affecting the brain’s balance center.
Jacobson’s organ – A smell organ in many animals but not humans.
Jaw tremor – Shaking of the jaw from Parkinson’s disease.
Jigsaw memory – The brain’s ability to piece together fragments of a memory.
Jerk-locked averaging – A method to study sudden muscle movements.
Juvenile myoclonic epilepsy – A seizure disorder starting in teenagers.
Jaw dystonia – Involuntary jaw muscle spasms that open or close the mouth.
Jugular foramen syndrome – Nerve damage from a hole in the skull base.
Jigsaw perception – How the brain fits separate images into one whole picture.
Jerk ratio – A measure of how quickly a movement changes direction.
Jactatio capitis nocturna – Head banging during sleep in young children.
Jaw pain pathway – The nerve route that carries pain signals from the jaw.
Junction potential – A tiny voltage where two nerve cells meet.
Jitter amplitude – The size of shaking movements in tremors.
Jaw tracking – Measuring how the jaw moves during speech or eating.

Engineering & Materials Science Words That Start With J

Engineers build things that work. These STEM words that start with J help you name tools, forces, and materials.

Josephson effect and Johnson noise are advanced terms here. This science alphabet J list is great for engineering students.

Jig – A tool that holds a workpiece in the exact right spot.
Joule – Energy needed to push with one newton for one meter.
Junction diode – A one-way valve for electricity in circuits.
Jig boring – Drilling very precise holes in metal parts.
Joystick – A lever that controls robots, cranes, or video games.
Jigsaw – A power saw that cuts curved shapes in wood or metal.
Jigging – Moving a tool or part up and down during machining.
Joule-Thomson effect – Cooling of a gas when it expands through a tiny hole.
Jig grinder – A machine that makes very smooth, round holes.
Johnson noise – Random electrical noise from hot resistors.
Josephson effect – Supercurrent flowing across an insulator between two superconductors.
Jib – The long arm of a crane that holds the load.
Joggle – A small bend in a metal part to align two pieces.
Joule heating – Heat made when electricity flows through a wire.
Junction box – A plastic or metal box that protects wire connections.
Jib crane – A crane with a horizontal arm attached to a wall or pole.
Jig saw blade – The thin, toothed blade used for cutting curves.
Jerk limit – The fastest allowed change in acceleration for passenger comfort.
Joule loss – Energy wasted as heat in an electric motor or wire.
Junction temperature – The hottest point inside a computer chip.
Jigsaw puzzle joint – A wood joint with interlocking curved cuts.
Jig fixture – A device that both holds and guides a cutting tool.
Jounce bumper – A rubber part that stops a car’s suspension from bottoming out.
Jet propulsion – Thrust from pushing a high-speed fluid out the back.
Jig welding – Welding parts held in place by a jig for perfect alignment.

FAQs

What is a scientific word that starts with J?

Joule is a scientific word that starts with J – it is the SI unit of energy.

What are 10 words that start with J?

Jet, Joule, Jupiter, Jurassic, Jejunum, Jellyfish, Junction, Jacobian, Jökulhlaup, and Jarosite.

What is J for in science?

J stands for Joule, the standard unit of energy, work, and heat in physics.

What starts with J in chemistry?

Jarosite, Jacobsite, Jervine, Jasmone, and Juglone are chemistry terms that start with J

Conclusion

We have learned many Science Words Start With J in this article. You now know words from physics like Joule, from biology like Jurassic period, and from medicine like juxtaglomerular cells. These Science Words Start With J help you understand your science books better. Teachers use these words in class. Tests like the SAT and ACT ask about these words. You can use this list to study for your next exam.

Keep this list of Science Words Start With J for your homework and projects. Each word gives you a small piece of science knowledge. You do not need to memorize all 300 words at once. Learn five words each day. Soon you will master many Science Words Start With J. Science becomes easier when you know the right words. Bookmark this page and return anytime you need help with J science terms.

Science Words That Start With J – Complete List of J Science Terms With Meaning