Meaning of PTERIN in English

noun Etymology: International Scientific Vocabulary pter- (from Greek pteron wing) + 1-in; from its being a factor in the pigments of butterfly wings Date: 1934 any of various compounds that contain the bicyclic ring system characteristic of pteridine

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.