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Any of various water-soluble protein derivatives formed by partial hydrolysis or digestion of proteins by an acid or enzyme, used in culture media in bacteriology.

[German Pepton, from Greek peptos, digested, from peptein, to digest; see pekw- in Indo-European roots.]

pep·ton′ic (-tŏn′ĭk) adj.


(Biochemistry) biochem any of a group of compounds that form an intermediary group in the digestion of proteins to amino acids. See also proteose
[C19: from German Pepton, from Greek pepton something digested, from peptein to digest]
peptonic adj


(ˈpɛp toʊn)

any of a class of diffusible, soluble substances into which proteins are converted by partial hydrolysis.
[1855–60; < German Pepton < Greek peptón, neuter of peptós cooked, digested, v. adj. of péptein]
pep•ton′ic (-ˈtɒn ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.peptone - any of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids
organic compound - any compound of carbon and another element or a radical


[ˈpeptəʊn] Npeptona f
References in periodicals archive ?
A set of reagents for the qualitative determination of bacteria of the genus salmonella, broth for dressing, a test for the qualitative determination of bacteria of the species listeria monocytogenes, selective mixture of salmonella, buffered peptone water
After 10 minutes, this peptone water poured over Mueller-Hinton agar to cover its entire surface.
Out of each sample, 25 g were inoculated into 250 ml peptone water (enrichment broth), incubated at 37degC for 24 h and then, cultivated onto nutrient agar, eosin methylene bile agar (Kim and Bhunia, 2008) and MacConkey agar media and incubated for 24 h at 37degC.
The basal culture medium containing 2 g/liter peptone water, 2 g/liter yeast extract, 0.
1% peptone water and was homogenized for 60 s using a Stomacher blender (Lab Stomacher Blender 400-BA 7021 Seward Medical, England) at room temperature.
From each specimen, 25 gm of human stool with a sterile wood spatula or animal bile were directly injected into an Erlenmeyer flask and 225 ml of buffered peptone water were added to obtain 1 part sample+9 part buffer, then mixed and incubated at 37[degrees]C overnight (16-20 hr).
The stool samples were inoculated in alkaline peptone water for enrichment.
Salmonella and Shigella strains were isolated after pre-enrichment in buffered Peptone Water (FlukaBioChemica, Spain).
coli O157:H7 cells suspended in peptone water were treated with about 0.
For all microbial counts 100ml peptone water was added to 100gm sample and the mixture was incubated for 8hrs with occasional shaking.
Enriched peptone water after incubation was streaked onto TCBS agar (Himedia) plates that were incubated for 18-24 h at 35-37[degrees]C.