photopigment

noun
pho·​to·​pig·​ment | \ ˈfōt-ō-ˌpig-mənt How to pronounce photopigment (audio) \

Medical Definition of photopigment

: a pigment (as chlorophyll or a compound in the retina) that undergoes a physical or chemical change under the action of light

Learn More about photopigment

Cite this Entry

“Photopigment.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/photopigment. Accessed 27 Sep. 2020.

Comments on photopigment

What made you want to look up photopigment? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!