a device used for fragmenting kidney stones with ultrasound waves.
Origin: 1815–25; respelling, with -er1, of litho(n)triptor instrument for crushing kidney stones, pseudo- L derivative (cf. captor, raptor) of litho(n)triptic, ultimately based on the Greek phrase (phármaka tôn en nephroîs) líthōn thryptiká (drugs) breaking up stones (in the kidneys); trip- by association with Greektrī́bein to rub, knead, pound (verbal adjective trīptós)
lithotripter lith·o·trip·ter (lĭth'ə-trĭp'tər) n. A device that pulverizes kidney stones by passing shock waves through a water-filled tub in which the patient sits. The procedure creates stone fragments small enough to be expelled in the urine.