pyrimidine

noun
py·​rim·​i·​dine | \pī-ˈri-mə-ˌdēn, pə-\

Definition of pyrimidine 

1 : a feeble organic base C4H4N2 of penetrating odor

2 : a derivative of pyrimidine especially : a base (such as cytosine, thymine, or uracil) that is a constituent of DNA or RNA

First Known Use of pyrimidine

1885, in the meaning defined at sense 1

History and Etymology for pyrimidine

International Scientific Vocabulary, alteration of pyridine

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The first known use of pyrimidine was in 1885

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pyrimidine

noun
py·​rim·​i·​dine | \pī-ˈrim-ə-ˌdēn, pə- \

Medical Definition of pyrimidine 

1 : a weakly basic organic compound C4H2N2 of penetrating odor that is composed of a single six-membered ring having four carbon atoms with nitrogen atoms in positions one and three

2 : a derivative of pyrimidine having its characteristic ring structure especially : a base (as cytosine, thymine, or uracil) that is a constituent of DNA or RNA

More from Merriam-Webster on pyrimidine

Britannica.com: Encyclopedia article about pyrimidine

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