Meaning: A person who believes in creationism.

Part of speech: noun

Example: The creationist argued against evolutionary theory.

Category: Science

Synonyms: believer in creationism

Meaning: A thick, oily liquid used as a wood preservative.

Part of speech: noun

Example: They treated the fence with creosote to protect it from rot.

Category: Science › Chemistry

Synonyms: wood preservative

Meaning: The shape of the moon when it is less than half full.

Part of speech: noun

Example: The crescent moon shone brightly in the night sky.

Category: Science › Astronomy

Synonyms:

• half-moon
• arc

Meaning: the minimum amount of material needed to start a nuclear reaction

Part of speech: noun

Example: The reactor reached critical mass.

Category: Science › Physics

Synonyms:

• threshold
• minimum

Meaning: A cut or slice through an object to show its internal structure.

Part of speech: noun

Example: The cross-section of the fruit shows its seeds.

Category: Science › Geology

Synonyms: slice

Meaning: A container used for melting substances at high temperatures.

Part of speech: noun

Example: The metal was melted in a crucible.

Category: Science › Chemistry

Synonyms: container

Meaning: In a natural or raw state; not processed.

Part of speech: adjective

Example: Crude oil is extracted from the ground.

Category: Science › Chemistry

Synonyms:

• raw
• unrefined

Meaning: Unrefined petroleum extracted from the ground.

Part of speech: noun

Example: Crude oil is a major energy source.

Category: Science › Energy

Synonyms: petroleum

Meaning: a substance used to produce very low temperatures

Part of speech: noun

Example: Liquid nitrogen is a common cryogen.

Category: Science › Physics

Synonyms:

• refrigerant
• coolant

Meaning: the study of materials at very low temperatures

Part of speech: noun

Example: Cryogenics is important for preserving biological samples.

Category: Science › Physics

Synonyms:

• low-temperature physics
• cryobiology

Meaning: a solid material whose atoms are arranged in a highly ordered structure

Part of speech: noun

Example: The crystal sparkled in the sunlight.

Category: Science › Mineralogy

Synonyms:

• gem
• mineral

Meaning: having the structure and form of a crystal

Part of speech: adjective

Example: The water was crystalline and clear.

Category: Science › Mineralogy

Synonyms:

• clear
• transparent

Antonyms:

• cloudy
• opaque

Meaning: to form crystals or to make something clear

Part of speech: verb

Example: The sugar will crystallize in the solution.

Category: Science

Synonyms:

• solidify
• clarify

Antonyms:

• dissolve
• confuse

Meaning: the study of crystals and their structures

Part of speech: noun

Example: Crystallography helps scientists understand material properties.

Category: Science › Mineralogy

Synonyms:

• crystal science
• mineralogy

Meaning: A type of cloud that is tall and dense, often associated with thunderstorms.

Part of speech: noun

Example: Cumulonimbus clouds can produce heavy rain and lightning.

Category: Science › Meteorology

Synonyms:

• thundercloud
• storm cloud

Meaning: A type of cloud that is fluffy and white, often seen in fair weather.

Part of speech: noun

Example: Cumulus clouds indicate good weather.

Category: Science › Meteorology

Synonyms:

• fluffy cloud
• heap cloud

Meaning: A radioactive element with the symbol Cm, used in nuclear reactors.

Part of speech: noun

Example: Curium is used in some types of nuclear batteries.

Category: Science › Chemistry

Synonyms:

• element
• radioactive material

Meaning: The amount by which a curve deviates from being flat.

Part of speech: noun

Example: The curvature of the road made driving difficult.

Category: Science › Mathematics

Synonyms:

• bend
• arc

Antonyms: flatness

Meaning: A smoothly flowing, continuous line or path that is not straight.

Part of speech: noun

Example: The curve of the river was beautiful.

Category: Science › Mathematics

Synonyms:

• bend
• arc

Antonyms: straight line

Meaning: Having a rounded shape; not straight.

Part of speech: adjective

Example: The curved road was difficult to navigate.

Category: Science › Mathematics

Synonyms:

• bent
• rounded

Antonyms: straight

Meaning: Consisting of or bounded by curved lines.

Part of speech: adjective

Example: The curvilinear design of the building was striking.

Category: Science › Mathematics

Synonyms:

• curved
• flowing

Meaning: A pointed end where two curves meet.

Part of speech: noun

Example: The cusp of the mountain was covered in snow.

Category: Science › Geometry

Synonyms:

• point
• edge

Meaning: A unit of weight equal to 112 pounds (approximately 50.8 kg).

Part of speech: noun

Example: The shipment weighed five cwt.

Category: Science › Measurement

Synonyms: hundredweight

Meaning: A highly toxic chemical compound.

Part of speech: noun

Example: Cyanide can be deadly if ingested.

Category: Science › Chemistry

Synonyms:

• toxin
• poison

Meaning: The study of communication and control in living organisms and machines.

Part of speech: noun

Example: Cybernetics combines elements of biology and engineering.

Category: Science › Biology

Synonyms:

• control theory
• systems theory

Meaning: A being with both organic and biomechatronic body parts.

Part of speech: noun

Example: In the movie, the hero is a cyborg with enhanced abilities.

Category: Science › Biotechnology

Synonyms:

• android
• robot

Meaning: A series of events that are regularly repeated in the same order.

Part of speech: noun

Example: The water cycle is essential for life on Earth.

Category: Science › Environmental Science

Synonyms:

• sequence
• rotation

Meaning: Occurring in cycles; recurring in a regular pattern.

Part of speech: adjective

Example: The cyclic nature of the seasons affects agriculture.

Category: Science › Mathematics

Synonyms:

• repetitive
• periodic

Meaning: A large-scale air mass that rotates around a center of low atmospheric pressure.

Part of speech: noun

Example: The cyclone caused severe damage to the coastal area.

Category: Science › Meteorology

Synonyms:

• storm
• hurricane

Meaning: A type of particle accelerator that uses a magnetic field to accelerate charged particles.

Part of speech: noun

Example: The cyclotron is used in nuclear physics research.

Category: Science › Physics

Synonyms: particle accelerator

Meaning: A method of transforming a message to keep it secret.

Part of speech: noun

Example: The spy used a cypher to communicate securely.

Category: Science › Cryptography

Synonyms:

• code
• cipher

Meaning: The study of cells, their structure, and function.

Part of speech: noun

Example: Cytology is important for understanding diseases.

Category: Science › Biology

Synonyms:

• cell biology
• cell science

Meaning: The gel-like substance inside a cell, excluding the nucleus.

Part of speech: noun

Example: The cytoplasm contains organelles that perform various functions.

Category: Science › Biology

Synonyms:

• cell fluid
• protoplasm

Meaning: a form of matter that does not emit light or energy

Part of speech: noun

Example: Dark matter makes up most of the universe.

Category: Science › Astrophysics

Synonyms: unknown matter

Meaning: a theoretical star that does not emit light

Part of speech: noun

Example: A dark star is a concept in astrophysics.

Category: Science › Astrophysics

Synonyms: invisible star

Meaning: the theory of evolution by natural selection

Part of speech: noun

Example: Darwinism explains how species evolve over time.

Category: Science › Biology

Synonyms: evolutionary theory

Meaning: facts and statistics collected for analysis

Part of speech: noun

Example: The data showed a significant increase in sales.

Category: Science › Statistics

Synonyms:

• information
• statistics

Meaning: Dichloro-Diphenyl-Trichloroethane; a pesticide that was widely used but is now banned in many countries.

Part of speech: abbreviation

Example: DDT was effective in controlling pests but harmful to the environment.

Category: Science › Chemistry

Meaning: to expose the falseness of a belief or claim.

Part of speech: verb

Example: The scientist aimed to debunk the myth.

Category: Science

Synonyms:

• disprove
• refute

Antonyms:

• confirm
• validate

Meaning: a unit used to measure the intensity of sound.

Part of speech: noun

Example: The music was played at a high decibel level.

Category: Science

Synonyms:

• sound level
• loudness