Definition of peptide in English:



  • A compound consisting of two or more amino acids linked in a chain, the carboxyl group of each acid being joined to the amino group of the next by a bond of the type OCNH.

    • ‘These peptides are composed of amino acids, but are much smaller than proteins.’
    • ‘If there are only two amino acids then the peptide is a dipeptide.’
    • ‘The peptide contains complementary amino acid sequences, with alternating positive and negative charges.’
    • ‘Transport of peptides and amino acids has been demonstrated in scutella isolated from barley, wheat, rice, and maize.’
    • ‘Among the amino acids of the peptide, the most dramatic change was the Phe residue.’


Early 20th century: from German Peptid, back-formation from Polypeptid ‘polypeptide’.