The Collaborative International Dictionary of English v.0.48:
Lithotomy \Li*thot"o*my\, n. [L. lithotomia, Gr. ?: cf. F. lithotomie.] (Surg.) The operation, art, or practice of cutting for stone in the bladder. [1913 Webster]WordNet (r) 3.0 (2006):
lithotomy n 1: surgical removal of a stone (calculus)