cytosine

noun
cy·​to·​sine | \ ˈsī-tə-ˌsēn How to pronounce cytosine (audio) \

Definition of cytosine

: a pyrimidine base C4H5N3O that codes genetic information in the polynucleotide chain of DNA or RNA — compare adenine, guanine, thymine, uracil

Examples of cytosine in a Sentence

Recent Examples on the Web There are four bases in DNA: adenine (A), cytosine (C), guanine (G) and thymine (T). Sandee Lamotte, CNN, 31 May 2022 For the more recent experiments, cooler water and more sensitive study methods were used to extract and identify the nucleobases cytosine and thymine, while more sensitive study methods found the molecules, researchers say. Mike Snider, USA TODAY, 28 Apr. 2022 Trading down is as much a part of GM John Schneider’s DNA as adenine, guanine, cytosine and thymine. Eddie Brown, San Diego Union-Tribune, 28 Apr. 2022 All genes consists of base pairs made of adenine (A), thymine (T), guanine (G), and cytosine (C). Manasee Wagh, Popular Mechanics, 1 Apr. 2022 The low prevalence of uracil sequences is connotated by an enrichment for guanine and cytosine sequences. William A. Haseltine, Forbes, 28 Oct. 2021 Called a tautomer, the drug assumes two forms, one which closely resembles uracil (U) and the other cytosine (C). William A. Haseltine, Forbes, 8 Oct. 2021 Researchers have long been intrigued by the possibility that evolution could have gone in a different direction with DNA’s four bases: adenine (A), thymine (T), cytosine (C) and guanine (G). Quanta Magazine, 12 July 2021 Each gene consists of some number of base pairs made of adenine (A), thymine (T), guanine (G), and cytosine (C). Caroline Delbert, Popular Mechanics, 3 June 2021 See More

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

First Known Use of cytosine

1894, in the meaning defined above

History and Etymology for cytosine

International Scientific Vocabulary cyt- + -ose + -ine entry 2

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Time Traveler for cytosine

Time Traveler

The first known use of cytosine was in 1894

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Dictionary Entries Near cytosine

cytoreticulum

cytosine

cytoskeleton

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Statistics for cytosine

Cite this Entry

“Cytosine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cytosine. Accessed 14 Aug. 2022.

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More Definitions for cytosine

cytosine

noun
cy·​to·​sine | \ ˈsīt-ə-ˌsēn How to pronounce cytosine (audio) \

Medical Definition of cytosine

: a pyrimidine base C4H5N3O that codes genetic information in the polynucleotide chain of DNA or RNA — compare adenine, guanine, thymine, uracil

More from Merriam-Webster on cytosine

Britannica.com: Encyclopedia article about cytosine

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