1) Guanosine 2) Nucleoside 1) Guanosine 
Deoxyguanosine is composed of the purine nucleobase guanine linked by its N9 nitrogen to the C1 carbon of deoxyribose. It is similar to guanosine, but with one hydroxyl group removed from the 2` position of the ribose sugar (making it deoxyribose). If a phosphate group is attached at the 5` position, it becomes deoxyguanosine monophosphate. ...
<chemical> A nucleoside consisting of the base guanine and the sugar deoxyribose. ... Chemical name: Guanosine, 2'-deoxy- ... (12 Dec 1998) ... 
Type: Term Pronunciation: dē-oks′ē-gwahn′ō-sēn Definitions: 1. 2′-Deoxyribosylguanine, one of the four major nucleosides of DNA (the others being deoxyadenosine, deoxycytidine, and thymidine). Found to accumulate in individuals with purine nucleoside phosphorylase deficiency.
[n] - a nucleoside component of DNA
guanosine noun a nucleoside component of DNA; composed of guanine and deoxyribose