lithotomyPronunciation: /lɪˈθɒtəmi/Definition of lithotomy noun [mass noun] surgical removal of a calculus (stone) from the bladder, kidney, or urinary tract. Derivatives lithotomist noun Origin: mid 17th century: via late Latin from Greek lithotomia (see litho-, -tomy)lithotomy in other Oxford dictionaries Definition of lithotomy in the US English dictionary