noun \ˈis-kē-əm\
plural is·chia \-ə\

Definition of ISCHIUM

: the dorsal and posterior of the three principal bones composing either half of the pelvis consisting in humans of a thick portion, a large rough eminence on which the body rests when sitting, and a forwardly directed ramus which joins that of the pubis

Illustration of ISCHIUM

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