pterin

noun
pter·​in | \ˈter-ən \

Definition of pterin 

: any of various compounds that contain the bicyclic ring system characteristic of pteridine

First Known Use of pterin

1934, in the meaning defined above

History and Etymology for pterin

International Scientific Vocabulary pter- (from Greek pteron wing) + -in entry 1; from its being a factor in the pigments of butterfly wings

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The first known use of pterin was in 1934

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pterin

noun
pter·​in | \ˈter-ən \

Medical Definition of pterin 

: any of various compounds that contain the bicyclic ring system characteristic of pteridine

More from Merriam-Webster on pterin

Britannica.com: Encyclopedia article about pterin

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