Definition: Anatomically part of your pelvis (the ischial tuberosity, to be exact), the sit bones are quite literally the bones under the flesh of the butt that you sit on.
Also Known As: Sitting Bones, Sits Bones, Sitz Bones
By Ann Pizer, About.com Guide
Updated August 05, 2012
About.com Health's Disease and Condition content is reviewed by our Medical Review Board
Sit Bones
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