nucleoside
noun
nu·cle·o·side
ˈnü-klē-ə-ˌsīd
ˈnyü-
: a compound (such as guanosine or adenosine) that consists of a purine or pyrimidine base combined with deoxyribose or ribose and is found especially in DNA or RNA
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Merriam-Webster unabridged
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