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[ad-n-in, -een, -ahyn] /ˈæd n ɪn, -ˌin, -ˌaɪn/
Biochemistry. a purine base, C 5 H 5 N 5 , one of the fundamental components of nucleic acids, as DNA, in which it forms a base pair with thymine, and RNA, in which it pairs with uracil. Symbol: A.
Origin of adenine
1880-85; < German Adenin; see aden-, -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for adenine
Historical Examples
  • adenine and guanine are constituents of all nucleic acids (see below) and, hence, are found in all plant and animal tissues.

    The Chemistry of Plant Life Roscoe Wilfred Thatcher
British Dictionary definitions for adenine


/ˈædənɪn; -ˌniːn; -ˌnaɪn/
a purine base present in tissues of all living organisms as a constituent of the nucleic acids DNA and RNA and of certain coenzymes; 6-aminopurine. Formula: C5H5N5; melting pt: 360–365°C
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
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Word Origin and History for adenine

crystaline base, 1885, coined by German physiologist/chemist Albrecht Kossel (1853-1927) from Greek aden "gland" (see inguinal) + chemical suffix -ine (2). So called because it was derived from the pancreas of an ox.

Online Etymology Dictionary, © 2010 Douglas Harper
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adenine in Medicine

adenine ad·e·nine (ād'n-ēn', -ĭn)
Abbr. A
A purine base that is a constituent of DNA and RNA and an important energy transport and storage component in cellular metabolism.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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adenine in Science
A purine base that is a component of DNA and RNA, forming a base pair with thymine in DNA and with uracil in RNA. Adenine is also part of other biologically important compounds, such as ATP, NAD, and vitamin B-12, and occurs in tea. Chemical formula: C5H5N5.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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