Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A purine base, C5H5ON5, that is an essential constituent of both RNA and DNA.

from The Century Dictionary.

  • noun A substance (C5H5N5O) contained in guano.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry A substance first obtained from guano; it is a nucleic base and pairs with cytosine in DNA and RNA.

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

  • noun a purine base found in DNA and RNA; pairs with cytosine

Etymologies

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

[From guano, in which it is found.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From guano + -ine.

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Examples

  • The bird droppings, applied in a 90-minute facial, are packed with an enzyme called guanine — an amino acid which heals the skin, experts claim.

    dustbury.com » That doo-doo that you do so well 2007

  • The bird droppings, applied in a 90- minute facial, are packed with an enzyme called guanine – an amino acid which heals the skin, experts claim.

    Bird Poo Used For Beauty Face Mask | Impact Lab 2007

  • it was thanks to the droppings, which contain an enzyme called guanine that leaves the skin clean, smooth and supple.

    Beauty secret: nightingale droppings. Ann Althouse 2008

  • the droppings, which contain an enzyme called guanine

    Beauty secret: nightingale droppings. Ann Althouse 2008

  • I’m really sorry, but I just want to scream when they call guanine and enzyme and an amino acid.

    dustbury.com » That doo-doo that you do so well 2007

  • I have spent time, too much time, trying to explain minutiae such as guanine and cytosine having 3 hydrogen bonds while adenine and thymine have two or is it the other way round when much of my class is amazed that a bean from a Goya package will grow when stuck in the ground.

    SWBAT for biology this year doyle 2008

  • I have spent time, too much time, trying to explain minutiae such as guanine and cytosine having 3 hydrogen bonds while adenine and thymine have two or is it the other way round when much of my class is amazed that a bean from a Goya package will grow when stuck in the ground.

    Archive 2008-08-01 doyle 2008

  • Furthermore, although Powner and colleagues 'synthetic sequence yields the pyrimidine ribonucleotides, it cannot explain how purine ribonucleotides (which incorporate guanine and adenine) might have formed.

    Convincing Evidence for God 2010

  • Furthermore, although Powner and colleagues 'synthetic sequence yields the pyrimidine ribonucleotides, it cannot explain how purine ribonucleotides (which incorporate guanine and adenine) might have formed.

    Convincing Evidence for God 2010

  • For 40 years, efforts to understand the prebiotic synthesis of the ribonucleotide building blocks of RNA have been based on the assumption that they must have assembled from their three molecular components: a nucleobase (which can be adenine, guanine, cytosine or uracil), a ribose sugar and phosphate.

    Convincing Evidence for God 2010

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