peptococcus

noun
pep·​to·​coc·​cus | \ˌpep-tə-ˈkäk-əs \

Medical Definition of peptococcus 

1 capitalized : a genus of anaerobic gram-positive coccal bacteria that do not form spores and are now considered to comprise a single species (P. niger)

2 plural peptococci\ -​ˈkäk-​ˌ(s)ī \ : any bacterium of the genus Peptococcus

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