[ pep-tohn ]
/ ˈpɛp toʊn /

noun Biochemistry.

any of a class of diffusible, soluble substances into which proteins are converted by partial hydrolysis.

Origin of peptone

1855–60; < German Pepton < Greek peptón, neuter of peptós cooked, digested, verbid of péptein
Related formspep·tone·like, adjectivepep·ton·ic [pep-ton-ik] /pɛpˈtɒn ɪk/, adjectivepep·to·noid [pep-tuh-noid] /ˈpɛp təˌnɔɪd/, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for peptone

British Dictionary definitions for peptone


/ (ˈpɛptəʊn) /


biochem any of a group of compounds that form an intermediary group in the digestion of proteins to amino acidsSee also proteose
Derived Formspeptonic (pɛpˈtɒnɪk), adjective

Word Origin for peptone

C19: from German Pepton, from Greek pepton something digested, from peptein to digest
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 peptone



1860, from German Pepton, from Greek pepton, neuter of peptos "cooked, digested" (see peptic).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for peptone


[ pĕptōn′ ]


Any of various soluble compounds that do not coagulate, are obtained by acid or enzyme hydrolysis of natural protein, and are used as nutrients in culture media.
Related formspep•tonic (-tŏnĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.