Definitions for guanosineˈgwɑ nəˌsin, -sɪn
Random House Webster's College Dictionary
gua•no•sineˈgwɑ nəˌsin, -sɪn(n.)
a ribonucleoside component of ribonucleic acid, comprising ribose and guanine.
Origin of guanosine:
a nucleoside component of DNA; composed of guanine and deoxyribose
A nucleoside derived from guanine and ribose.
U.S. National Library of Medicine
A purine nucleoside that has guanine linked by its N9 nitrogen to the C1 carbon of ribose. It is a component of ribonucleic acid and its nucleotides play important roles in metabolism. (From Dorland, 28th ed)