Meaning of amino acid

ami'no ac'id

Pronunciation: [key]
— Biochem. Biochem.
  1. any of a class of organic compounds that contains at least one amino group, –NH, and one carboxyl group, –COOH: the alpha-amino acids, RCH(NH)COOH, are the building blocks from which proteins are constructed. Cf. essential amino acid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.