from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A pyrimidine base, C5H6N2O2, that is an essential constituent of DNA.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A base, C5H6N2O2, obtained by applying sulphuric acid to thymic acid; it pairs with adenine in DNA.

from The Century Dictionary and Cyclopedia

  • n. A colorless crystalline compound, C5H6N2O2, prepared by the action of dilute sulphuric acid on thymic acid. It may also be obtained synthetically. It sublimes in plates and melts above 250° C. Also called 5-methyluracil.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine


from The American Heritage® Dictionary of the English Language, 4th Edition

thym(ic acid), acid obtained from the thymus + -ine2.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From thymic + -ine.


  • The two others, thymine and cytosine, showed a simpler composition; experiments of breakdown and synthesis led to the result that in thymine there must be a grouping of the carbon and nitrogen atoms corresponding to the following scheme:

    Albrecht Kossel - Nobel Lecture

  • It is evident from the formulae that in thymine and cytosine a ring-like system of carbon and nitrogen atoms must be assumed.

    Albrecht Kossel - Nobel Lecture

  • The UVA1 induced a type of lesion called thymine dimers on the deeper basal layers of the skin.

    Yahoo! News: Business - Opinion

  • Thymine dioxygenase 1 Nomenclature EC number Systematic name thymine,2-oxoglutarate: oxygen oxidoreductase (7-hydroxylating) Recommended name thymine dioxygenase Synonyms 5-hydroxy-methyluracil dioxygenase 5-hydroxy-methyluracil oxygenase thymine 7-hydroxylase thymine dioxygenase CAS registry number 37256-67-0 2 Source Organism

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  • The electrons in a DNA molecule such as thymine, for instance, knit together and are firmly attached to thymine's atoms.

    The Berkeley Daily Planet, The East Bay's Independent Newspaper

  • These symbols represent the four basic chemical letters, or bases, the body uses to form DNA--guanine, cytosine, adenine and thymine.

    Gene Machine

  • Each nucleotide unit is composed of a sugar, a phosphate, and one of four bases, adenine, cytosine, guanine, or thymine.

    Spider Bones

  • I realized that I could use a simple quilt block to represent each of the four bases in DNA: cytosine, guanine, adenine, and thymine.

    Boing Boing

  • He paired adenine with adenine instead of pairing it with thymine.


  • Department of Agriculture deciphered the first gene sequence, indirectly "reading" the order of the four bases (adenine, thymine, cytosine, guanine) that pair up to make all genes, thereby allowing us to understand the blueprint from which each human is built.

    The Genome Generation


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