Meaning: A hard, high-carbon coal used for heating.

Part of speech: noun

Example: Anthracite burns cleaner than other types of coal.

Category: Science › Geology

Synonyms: hard coal

Meaning: Resembling humans; a type of primate.

Part of speech: noun

Example: Anthropoids include monkeys and apes.

Category: Science › Biology

Synonyms: primate

Meaning: A scientist who studies humans and their societies.

Part of speech: noun

Example: The anthropologist conducted field research in the village.

Category: Science › Anthropology

Synonyms: social scientist

Meaning: The study of humans and their cultures.

Part of speech: noun

Example: Anthropology helps us understand human behavior.

Category: Science › Social Sciences

Synonyms: human science

Meaning: Winds that blow in the opposite direction to trade winds.

Part of speech: noun

Example: The anti trade winds can affect sailing routes.

Category: Science › Meteorology

Meaning: A geological formation of rock layers that arch upwards.

Part of speech: noun

Example: The anticline is often a site for oil deposits.

Category: Science › Geology

Synonyms: fold

Meaning: In the opposite direction to the movement of clock hands.

Part of speech: adverb

Example: Turn the knob anticlockwise to open the door.

Category: Science › Physics

Synonyms: counterclockwise

Meaning: A weather system with high pressure.

Part of speech: noun

Example: The anticyclone brought clear skies and calm weather.

Category: Science › Meteorology

Synonyms: high-pressure system

Meaning: A substance that lowers the freezing point of a liquid.

Part of speech: noun

Example: Antifreeze is used in car engines to prevent freezing.

Category: Science › Chemistry

Synonyms: coolant

Meaning: A hypothetical force that counteracts gravity.

Part of speech: noun

Example: Scientists are researching antigravity technology for space travel.

Category: Science › Physics

Meaning: Matter composed of antiparticles.

Part of speech: noun

Example: Antimatter is a key concept in theoretical physics.

Category: Science › Physics

Meaning: A chemical element used in alloys and flame retardants.

Part of speech: noun

Example: Antimony is often used in batteries.

Category: Science › Chemistry

Meaning: A particle with opposite charge to its corresponding particle.

Part of speech: noun

Example: An electron's anti-particle is called a positron.

Category: Science › Physics

Meaning: The antiparticle of the proton.

Part of speech: noun

Example: Antiproton research is important in particle physics.

Category: Science › Physics

Meaning: A type of elementary particle that is the counterpart of a quark.

Part of speech: noun

Example: Antiquarks are essential in the study of particle physics.

Category: Science › Physics

Meaning: A large dinosaur known for its long neck.

Part of speech: noun

Example: The apato-saurus was a herbivore.

Category: Science › Paleontology

Synonyms: apatosaurus

Meaning: The highest point or peak of something.

Part of speech: noun

Example: The climbers reached the apex of the mountain.

Synonyms:

• peak
• summit

Antonyms:

• base
• bottom

Meaning: The highest point in the orbit of an object around the Earth.

Part of speech: noun

Example: The satellite reached its apogee before descending.

Category: Science › Astronomy

Synonyms: peak

Meaning: The equipment or machinery needed for a particular activity.

Part of speech: noun

Example: The laboratory has all the necessary apparatus for experiments.

Category: Science › Laboratory

Synonyms: equipment

Meaning: The brightness of a celestial object as seen from Earth.

Part of speech: noun

Example: The apparent magnitude of the star is measured in a specific scale.

Category: Science › Astronomy

Meaning: The cultivation of aquatic organisms, such as fish and plants.

Part of speech: noun

Example: Aquaculture is important for sustainable seafood production.

Category: Science › Marine Biology

Synonyms:

• fish farming
• marine farming

Meaning: Related to, or resembling water.

Part of speech: adjective

Example: The aqueous solution was used in the experiment.

Category: Science › Chemistry

Synonyms:

• watery
• liquid

Meaning: Relating to the study of archaeology.

Part of speech: adjective

Example: The archaeological site revealed many ancient artifacts.

Category: Science › Archaeology

Synonyms:

• historical
• ancient

Meaning: A person who studies human history through excavation and analysis of artifacts.

Part of speech: noun

Example: The archaeologist discovered ancient tools buried in the ground.

Category: Science › Archaeology

Synonyms:

• historian
• excavator

Meaning: The study of human history and prehistory through excavation and analysis of artifacts.

Part of speech: noun

Example: Archaeology helps us understand ancient civilizations.

Category: Science › Archaeology

Synonyms:

• anthropology
• history

Meaning: A genus of bird-like dinosaurs that is considered a transitional fossil between dinosaurs and modern birds.

Part of speech: noun

Example: The archaeopteryx is often cited as evidence of evolution.

Category: Science › Paleontology

Meaning: In a manner relating to archaeology.

Part of speech: adverb

Example: The site was archeologically significant due to its age.

Category: Science › Archaeology

Meaning: A colorless, odorless gas that is a noble gas and is used in various applications.

Part of speech: noun

Example: Argon is often used in light bulbs.

Category: Science › Chemistry

Synonyms:

• noble gas
• inert gas

Meaning: A toxic element used in pesticides and some alloys.

Part of speech: noun

Example: Arsenic is highly poisonous.

Category: Science › Chemistry

Synonyms:

• toxin
• poison

Meaning: A well in which water rises under natural pressure without pumping.

Part of speech: noun

Example: The artesian well provided fresh water for the community.

Category: Science › Hydrology

Synonyms: flowing well

Meaning: A type of jointed-legged animal, such as an insect or crustacean.

Part of speech: noun

Example: The arthro-pod scuttled across the sand.

Category: Science › Biology

Synonyms: jointed animal

Meaning: Having joints or segments that allow movement.

Part of speech: adjective

Example: The articulated model can bend at the joints.

Category: Science › Anatomy

Synonyms: jointed

Meaning: Made or produced by human beings rather than occurring naturally.

Part of speech: adjective

Example: The artificial flowers looked very realistic.

Category: Science

Synonyms:

• synthetic
• man-made

Antonyms: natural

Meaning: Life forms that are created through artificial means, often in a laboratory.

Part of speech: noun

Example: Research in artificial life explores the boundaries of biology.

Category: Science › Biology

Synonyms: synthetic life

Meaning: The quality of being artificial; lack of naturalness.

Part of speech: noun

Example: The artificiality of the decor was off-putting.

Category: Science

Synonyms: unnaturalness

Meaning: In a way that is not natural; made or produced by humans.

Part of speech: adverb

Example: The flowers were artificially colored for the event.

Category: Science

Synonyms: unnaturally

Meaning: A heat-resistant fibrous mineral that can cause health problems when inhaled.

Part of speech: noun

Example: Asbestos was commonly used in construction materials.

Category: Science › Mineralogy

Synonyms: mineral

Meaning: To analyze or test a substance for its composition or quality.

Part of speech: verb

Example: The lab will assay the sample for contaminants.

Category: Science › Chemistry

Synonyms:

• analyze
• test

Meaning: A radioactive element with the symbol At.

Part of speech: noun

Example: Astatine is rarely found in nature.

Category: Science › Chemistry

Synonyms:

• element
• chemical

Meaning: A small rocky body orbiting the sun.

Part of speech: noun

Example: The asteroid passed close to Earth.

Category: Science › Astronomy

Synonyms:

• planetoid
• minor planet