[thahy-meen, -min]
noun Biochemistry.
a pyrimidine base, C 5 H 6 N 2 O 2 , that is one of the principal components of DNA, in which it is paired with adenine. Symbol: T

1890–95; thym(ic)2 + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
thymine (ˈθaɪmiːn)
a white crystalline pyrimidine base found in DNA. Formula: C5H6N2O2
[C19: from thymic (see thymus) + -ine²]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

thymine thy·mine (thī'mēn')
A pyrimidine base that is an essential constituent of DNA.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
thymine   (thī'mēn')  Pronunciation Key 
A pyrimidine base that is a component of DNA. It forms a base pair with adenine. Chemical formula: C5H6N2O2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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