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167 words
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chlorophyll
green pigment in plants that helps photosynthesis
choreographer
A person who designs dance routines.
chromosome
A structure carrying genetic information.
chronic
Long-lasting and difficult to cure.
circulation
the distribution of printed material
circulatory
Related to the movement of blood in the body.
circulatory system
The heart and blood vessels, which move blood around the body.
citation
A reference to a source of information.
civil rights
The rights every citizen should have to equal and fair treatment.
civilization
A complex society with culture and government.
clarify
Make something clear or easier to understand.
classical conditioning
Learning in which a response becomes linked to a signal that previously meant nothing.
climate
The usual weather in a place.
closure
The permanent closing of a business or place.
coal
A black substance used as fuel.
cocaine
A powerful and illegal stimulant drug.
cocoon
A protective covering spun by an insect.
codify
To arrange laws or rules into a systematic code.
cognition
The process of thinking and understanding.
cognitive
Related to mental processes like thinking.
cold-blooded
Having a body temperature that changes with the surrounding air or water.
collective bargaining
Talks between a workers' union and employers about pay and working conditions.
collective behavior
Actions of large groups that do not follow usual social rules, like panics.
colonist
A person who settles in a new land.
Words selected by Inoh for the TOEFL iBT test. Not an official ETS list. How these words were chosen →