ischial tuberosity definition
Medical Definition of ISCHIAL TUBEROSITY. : a bony swelling on the posterior part of the superior ramus of the ischium that gives attachment to various muscles and bears the weight of the body in sitting.What made you want to look up ischial tuberosity?weet. : a bony swelling on the posterior part of the superior ramus of the ischium that gives attachment to various muscles and bears the weight of the body in sitting.