bladder calculus
noun [ C ] medical specialized uk/ˈblæd.ə ˌkæl.kjə.ləs/ us/ˈblæd.ɚ ˌkæl.kjə.ləs/ bladder calculi /ˈblæd.ə ˌkæl.kjə.li/ /ˈblæd.ɚ ˌkæl.kjə.li/ (also bladder stone)
膀胱结石
a small stone that irritates the walls of the bladder and interrupts the flow of urine