Main Entry: pep·to·nize Variant: also Britishpep·to·nise/'pep-t&-"nIz/ Function: transitive verb Inflected Forms:-nizedalso British-nised; -niz·ingalso British-nis·ing 1: to convert into peptone; especially: todigest or dissolve by a proteolytic enzyme 2: to combine with peptone