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 pépteinRelated formspep·tone·like, adjectivepep·ton·ic [pep-ton-ik] /pɛpˈtɒn ɪk/, adjectivepep·to·noid [pep-tuh-noid] /ˈpɛp təˌnɔɪd/, noun
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for peptone
Historical Examples of peptone
Protein, under the same conditions, is changed to a peptone.
Thus, 7.5 grammes of peptone dissolved in water in such proportion as to make a five per cent.
On the other hand, when peptone was introduced in larger quantity, viz., in a twenty per cent.
Further, it is not enough to admit the formation of a single intermediate body, midway between syntonin and peptone.
On now testing a portion of the clear filtrate for peptone by the biuret test, not a trace of a reaction could be obtained.
British Dictionary definitions for peptone
Derived Formspeptonic (pɛpˈtɒnɪk), adjective biochem any of a group of compounds that form an intermediary group in the digestion of proteins to amino acidsSee also proteose
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
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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
Related formspep•ton′ic (-tŏn′ĭk) adj.
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.
The American Heritage® Stedman's Medical Dictionary
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