noun Biochemistry.

a compound containing two or more amino acids in which the carboxyl group of one acid is linked to the amino group of the other.

Origin of peptide

1905–10; pept(ic) + -ide Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for peptide

Contemporary Examples of peptide

  • He has devoted his life to replicating that peptide and when he puts it back in the patient, their cancer goes away.

    The Daily Beast logo
    My War on Cancer

    Suzanne Somers

    November 8, 2009

British Dictionary definitions for peptide



any of a group of compounds consisting of two or more amino acids linked by chemical bonding between their respective carboxyl and amino groupsSee also peptide bond, polypeptide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for peptide

1906, from German peptid; see peptone + -ide, probably indicating a derivative.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for peptide




Any of various natural or synthetic compounds containing two or more amino acids linked by the carboxyl group of one amino acid and the amino group of another.
Related formspep•tidic (-tĭdĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for peptide



A chemical compound that is composed of a chain of two or more amino acids and is usually smaller than a protein. The amino acids can be alike or different. Many hormones and antibiotics are peptides.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.