cytosine
noun
cy·to·sine ˈsī-tə-ˌsēn 
: a pyrimidine base C4H5N3O that codes genetic information in the polynucleotide chain of DNA or RNA compare adenine, guanine, thymine, uracil
Example Sentences
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
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 Word History
Etymology
International Scientific Vocabulary cyt- + -ose + -ine entry 2
First Known Use
1894, in the meaning defined above
Medical Definition
cytosine
noun
cy·to·sine ˈsīt-ə-ˌsēn
: a pyrimidine base C4H5N3O that codes genetic information in the polynucleotide chain of DNA or RNA compare adenine, guanine, thymine, uracil