pteridine

noun

pter·​i·​dine ˈter-ə-ˌdēn 

: a yellow crystalline bicyclic base C₆H₄N₄

broadly : any of a class of compounds (such as the pterins) that have the bicyclic ring system of pteridine and include especially various animal pigments

Word History

Etymology

International Scientific Vocabulary pterin + -idine

First Known Use

1943, in the meaning defined above

Medical Definition

pteridine

noun

pter·​i·​dine ˈter-ə-ˌdēn 

: a yellow crystalline bicyclic base C₆H₄N₄ that is a structural constituent especially of various animal pigments