cytosine definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a pyrimidine base, CHNO, contained in the nucleic acids of all tissue: it links with guanine in the DNA structure
Origin: German zytosin ; from zyt-, cyto- plush -os, -ose plush -in, -ine
cytosine definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun Abbr. C
A pyrimidine base, C4H5N3O, that is the constituent of DNA and RNA involved in base pairing with guanine.
Origin: cyt(o)- + (rib)os(e) + -ine2.
cytosine - Medical Definition
The American Heritage® Medical Dictionary Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun Abbr. C
A pyrimidine base that is an essential constituent of RNA and DNA.
cytosine - Science Definition
A pyrimidine base that is a component of DNA and RNA, forming a base pair with guanine. Chemical formula: C4H5N3O.