n.
Pronunciation: ' gwä- ˌ n ē n
Function: noun
Etymology: guano + -ine; from its being found especially in guano
Date: 1850
: a purine base C 5 H 5 N 5 O that codes genetic information in the polynucleotide chain of DNA or RNA ― compare ADENINE , CYTOSINE , THYMINE , URACIL