Webster's Revised Unabridged Dictionary · 1913

Ischial

Ischial (is"ki*al) , adjective

(Anatomy) Of or pertaining to the ischium or hip; ischiac; ischiadic; ischiatic.
Collocations (1)
Ischial callosity (Zoology) , one of the patches of thickened, hairless, and often bright-colored skin, on the buttocks of many apes, as the drill.