pyrimidine


py·rim·i·dine

noun \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 (as cytosine, thymine, or uracil) that is a constituent of DNA or RNA

Origin of PYRIMIDINE

International Scientific Vocabulary, alteration of pyridine
First Known Use: 1885

py·rim·i·dine

noun \pī-ˈrim-ə-ˌdēn, pə-\   (Medical Dictionary)

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

pyrimidine

noun    (Concise Encyclopedia)

Any of a class of heterocyclic compounds with a ring structure of four carbon and two nitrogen atoms. The simplest member, pyrimidine itself (CHN), is not common, but derivatives with the structure are. Examples include thiamine (vitamin B), several sulfa drugs, barbiturates, and three of the bases in nucleic acids (cytosine, thymine, and uracil).

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