aden·​o·​sine ə-ˈde-nə-ˌsēn How to pronounce adenosine (audio)
: a nucleoside C10H13N5O4 that is a constituent of RNA and yields adenine and ribose on hydrolysis

Examples of adenosine in a Sentence

Recent Examples on the Web Napping clears out the adenosine and, when combined with caffeine, an adenosine-blocker further reduces its effects and amplifies the effects of the nap. Linda Melone, Health, 11 Feb. 2023 Caffeine acts to temporarily block the action of a chemical known as adenosine, a sleep-promoting agent that builds up during waking hours. Steven Bender, Discover Magazine, 1 Sep. 2023 Interaction with Neurotransmitters: CBD can interact with various neurotransmitters, such as serotonin and adenosine, which play a role in regulating brain activity. Amber Smith, Discover Magazine, 24 July 2023 Its generic drugs included adenosine, which is a drug for irregular heartbeats, and lorazepam, which is used for anxiety as well as nausea and vomiting in some cancer patients. Berkeley Lovelace Jr., NBC News, 16 July 2023 Caffeine and theobromine compete with adenosine to bind to the same adenosine receptor. Science & Food, Discover Magazine, 29 Sep. 2015 Caffeine blocks adenosine receptors. Ola Faleti,, 18 Apr. 2021 More to Know: On skin-care composition, this is infused with red algae extract for moisture, adenosine for smoothing, along with green coffee extract and caffeine for puffiness and dark circles. Kiana Murden, Vogue, 3 Mar. 2023 If the needle is stuck in the right general area, the extra adenosine reaches the receptors on the pain-transmitting neurons and shuts down their activity. Ed Yong, Discover Magazine, 30 May 2010 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'adenosine.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


borrowed from German Adenosin, blend of Adenin adenine and Ribose ribose

First Known Use

circa 1909, in the meaning defined above

Time Traveler
The first known use of adenosine was circa 1909

Dictionary Entries Near adenosine

Cite this Entry

“Adenosine.” Dictionary, Merriam-Webster, Accessed 10 Dec. 2023.

Medical Definition


aden·​o·​sine ə-ˈden-ə-ˌsēn, -sən How to pronounce adenosine (audio)
: a nucleoside C10H13N5O4 that is a constituent of RNA yielding adenine and ribose on hydrolysis
Last Updated: - Updated example sentences
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