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English word
HYPHEN
WORDNET DICTIONARY
OXFORD DICTIONARY
THESAURUS
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WORDNET DICTIONARY
Noun amino acid has 1 sense
- amino acid(n = noun.substance) aminoalkanoic acid - organic compounds containing an amino group and a carboxylic acid group; "proteins are composed of various proportions of about 20 common amino acids" has particulars: alanine, asparagine, aspartic acid, canavanine, citrulline, cysteine, cystine, dihydroxyphenylalanine, dopa, essential amino acid, gaba, gamma aminobutyric acid, glutamic acid, glutaminic acid, glutamine, glycine, hydroxyproline, iodoamino acid, ornithine, proline, creatin, creatine, sarcosine, serine, thyronine, tyramine, tyrosine
is a kind of organic compound
OXFORD DICTIONARY
amino acid, n. Biochem. any of a group of organic compounds containing both the carboxyl (COOH) and amino (NH2) group, occurring naturally in plant and animal tissues and forming the basic constituents of proteins.
Etymology
AMINE + ACID