cy·​ti·​dine ˈsi-tə-ˌdēn How to pronounce cytidine (audio) ˈsī- How to pronounce cytidine (audio)
: a nucleoside containing cytosine

Example Sentences

Recent Examples on the Web Early work showed molnupiravir inserts itself into RNA in place of the nucleoside cytidine, prompting errors in the copying process and causing a lethal buildup of mutations in the virus. Robert F. Service, Science | AAAS, 11 Mar. 2021 Creating this second base editor was harder than the first because an equivalent to the cytidine deaminase used by Dr Liu, which would be needed to pull it off, does not exist in nature. The Economist, 26 Oct. 2017

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

Word History


cytosine + -idine

First Known Use

1911, in the meaning defined above

Time Traveler
The first known use of cytidine was in 1911

Dictionary Entries Near cytidine

Cite this Entry

“Cytidine.” Dictionary, Merriam-Webster, Accessed 27 Jan. 2023.

Medical Definition


cy·​ti·​dine ˈsit-ə-ˌdēn How to pronounce cytidine (audio) ˈsīt- How to pronounce cytidine (audio)
: a nucleoside containing cytosine
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
True or False

Test your knowledge - and maybe learn something along the way.

Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?