Definition from Wiktionary, the free dictionary
- (organic chemistry) Any organic compound containing both an amino and a carboxylic acid functional group.
- (biochemistry) Any of the twenty naturally occurring α-amino acids (having the amino, and carboxylic acid groups on the same carbon atom), and a variety of side chains, that combine, via peptide bonds, to form proteins.
Related terms 
any organic compound containing amino and carboxylic acid
any of the twenty α-amino acids