Updated April 28, 2015.
Written or reviewed by a board-certified physician. See About.com's Medical Review Board.
Definition:
Ishial tuberosities are roundish protuberances that project from the lower part of your pelvic bone. These structures form the bony area on which your body rests during the act of sitting.
Related:
Also Known As: sitting bones, sitz bones, ischial tubes
Examples: The ishial tuberosities are those rounded bones you can feel underneath your pelvis when you sit upright.