Main Entry: gua·nine
Pronunciation: \ˈgwä-ˌnēn\
Function: noun
Etymology: guano + -ine; from its being found especially in guano
Date: 1850
: a purine base C5H5N5O that codes genetic information in the polynucleotide chain of DNA or RNA — compare adenine, cytosine, thymine, uracil
