Medical Definition of Aspartic acidAspartic acid: An amino acid, one of the 20 building blocks of protein. A amino acid that is not essential to the human diet, aspartic acid was discovered in protein in 1868. It has a role as a neurotransmitter. Symbol: Asp. Last Editorial Review: 6/9/2016 Back to MedTerms online medical dictionary A-Z List Need help identifying pills and medications? |


