Meaning of “pigment” - Learner’s Dictionary

pigment

noun [ C, U ] uk us /ˈpɪɡmənt/

a substance that gives something colour:

What is the name of the pigment contained in green plants?
pigmentation uk us /ˌpɪɡmənˈteɪʃən/ noun [ U ]

the natural colour of a living thing

(Definition of “pigment” from the Cambridge Learner’s Dictionary © Cambridge University Press)