lithotripsy (n.) Look up lithotripsy at Dictionary.com
operation of crushing a stone in the bladder, 1834, from litho- "stone" + -tripsy, from Greek tripsis "rubbing, friction," from tribein "to rub, thresh, pound, wear out," from PIE root *tere- (1) "to rub, turn." Klein says the intended Greek word is thryptein "to crush" and there has been "confusion" with tribein.