ischium

is·chi·um  (sk-m)

n. pl. is·chi·a (-k-)

The lowest of the three major bones that constitute each half of the pelvis.

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[Latin, hip joint, from Greek iskhion.]

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ischi·al (-l) adj.

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ischium  (sk-m)

Plural ischia

The lowest of the three major bones that constitute each half of the pelvis, distinct at birth but later becoming fused with the ilium and pubis.

Thesaurus

Noun

1.

ischium - one of the three sections of the hipbone; situated below the ilium ischial bone, os ischii bone, os - rigid connective tissue that makes up the skeleton of vertebrates articulatio coxae, coxa, hip joint, hip - the ball-and-socket joint between the head of the femur and the acetabulum pelvic arch, pelvic girdle, pelvis, hip - the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates