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[pep-tahyd] /ˈpɛp taɪd/
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 Dictionary, © Random House, Inc. 2015.
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Examples from the web for peptide
  • Dozens of specimens of this frog were sacrificed to collect peptide samples for previous studies.
  • These are abnormal deposits of a protein called amyloid beta peptide, which appear to gum up the workings of nerve cells.
  • Cells in the gut sense when the bacteria get too close, and produce a peptide that kills some of them off when they do.
  • The candidate must have a broad skill set that includes molecular biology, protein biochemistry, peptide chemistry and biophysics.
  • Converting pro-resilin into a rubbery solid required forming molecular cross-links between the spiral peptide strands.
  • This peptide is synthesized in two steps from free amino acids.
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 groups See 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
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Word Origin and History for peptide

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

Online Etymology Dictionary, © 2010 Douglas Harper
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peptide in Medicine

peptide pep·tide (pěp'tīd')
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.

pep·tid'ic (-tĭd'ĭk) adj.
pep·tid'i·cal·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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peptide in Science
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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