gua·​no·​sine ˈgwä-nə-ˌsēn How to pronounce guanosine (audio)
: a nucleoside C10H13N5O5 composed of guanine and ribose

Example Sentences

Recent Examples on the Web But a problem arises in people like Piqueras, whose TLR7 receptors can’t distinguish between genetic material in potentially dangerous viruses, and guanosine, a nucleic acid found in the body’s own RNA. Isabella Cueto, STAT, 18 June 2022 Although not one of the canonical RNA bases, inosine is read by the cell’s protein-translation machinery as the familiar guanosine. Sara Reardon, Scientific American, 5 Feb. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'guanosine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


guan- (as in guanine) + ribose + -ine

First Known Use

1909, in the meaning defined above

Time Traveler
The first known use of guanosine was in 1909

Dictionary Entries Near guanosine

Cite this Entry

“Guanosine.” Dictionary, Merriam-Webster, Accessed 26 Mar. 2023.

Medical Definition


gua·​no·​sine ˈgwän-ə-ˌsēn How to pronounce guanosine (audio)
: a nucleoside C10H13N5O5 composed of guanine and ribose
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