guanine: Meaning and Definition of
gua•nine
Pronunciation: (gwä'nēn), [key]
— n. Biochem.
- a purine base, CHNO, that is a fundamental constituent of DNA and RNA, in which it forms base pairs with cytosine. Symbol: G&hasp; Cf. guanosine.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.