- the lower portion of either innominate bone.
- either of the bones on which the body rests when sitting.
Origin of ischium
Examples from the Web for ischium
Historical Examples of ischium
The symphysis is long and includes part of both pubis and ischium.
Both pubis and ischium contribute to the symphysis which is often very long.
The pubis is slender, and the ischium is elevated and robust.Neotropical Hylid Frogs, Genus Smilisca
William E. Duellman
These two portions, pubis and ischium, limit an oval orifice, the subpubic foramen.
In them the arch is a mere slot, and being formed by the ischium alone, merits the name of the ischial arch.
- one of the three sections of the hipbone, situated below the ilium
Word Origin for ischium
Word Origin and History for ischium
"the seat bone," 1640s, from Latin, from Greek iskhion "hip joint," in plural, "the hips," probably from iskhi "loin," of unknown origin.
- 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.ischial bone
- 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.