breakdown of a stone of sorts. litho--stone lysis--breakdown
Patients with symptomatic cholelithiasis can be treated with certain medications called oral bile acid litholysis or oral dissolution therapy
"Litho-" means stone, "-lysis" is degradation, or dissolution, therefore, Im assuming "Litholysis" would be the term you are looking for.] Also to add to the previous definition, the word you could be looking for may be lithrotripsy which means the breaking up of stones. This is a procedure done by doctors to help a patient pass a stone.