the world > life > the body > structural parts > bone or bones > bony support for limbs > pelvis > [noun] > hip bone > innominate bone > ischium (3)
The lowest of the three parts of the os innominatum, the bone on which the body rests when sitting.
In various animals, esp. cattle: the part of the pelvis forming the bone of the buttock or rump. In later use also: a cut of beef lying over or…