Ornithine definition

ôrnə-thēn
An amino acid, C5 H12 N2 O2 , not found in proteins, formed by hydrolyzing arginine and important in the formation of urea.
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A nonessential amino acid, NH2(CH2)3CH(NH2)COOH, found in animals as a product of urea formation from proteins and in the excrement of birds.
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An amino acid, C5 H12 N2 O2 , not found in proteins, formed by hydrolyzing arginine and important in the formation of urea.
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An amino acid not found in proteins, formed by hydrolyzing arginine and important in the formation of urea. Chemical formula: C5H12N2O2.
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(biochemistry, organic chemistry) An amino acid, 2,5-diaminopentanoic acid, that is not present in protein, but is an intermediate in the biosynthesis of urea.
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Other Word Forms

Noun

Singular:
ornithine
Plural:
ornithines

Origin of ornithine

  • ornith(uric acid) an acid found in birds' urine (ornith(o)–) (uric acid) –ine

    From American Heritage Dictionary of the English Language, 5th Edition