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cytosine

American  
[sahy-tuh-seen, -zeen, -sin] / ˈsaɪ təˌsin, -ˌzin, -sɪn /

noun

Biochemistry.

  1. a pyrimidine base, C 4 H 5 N 3 O, that is one of the fundamental components of DNA and RNA, in which it forms a base pair with guanine. C

cytosine British  
/ ˈsaɪtəsɪn /

noun

  1. a white crystalline pyrimidine occurring in nucleic acids; 6-amino-2-hydroxy pyrimidine. Formula: C 4 H 5 N 3 O See also DNA RNA

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
cytosine Scientific  
/ sī′tə-sēn′ /

  1. A pyrimidine base that is a component of DNA and RNA, forming a base pair with guanine. Chemical formula: C 4 H 5 N 3 O.

Etymology

Origin of cytosine

< German Cytosin (1894); cyto-, -ose 2, -ine 2

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.