ischium

ischium, gen. ischii, pl. ischia (is´ke-um, is´ke-a)

The lower and posterior part of the hip bone, distinct at birth but later becoming fused with the ilium and pubis; it consists of a body, where it joins the ilium and superior ramus of the pubis to form the acetabulum, and a ramus joining the inferior ramus of the pubis.os ischii [NA], ischial bone; [Mod. L. fr. G. ischion, hip]

 

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