ischium

/is-kee-uhm/US // ˈɪs ki əm //UK // (ˈɪskɪəm) //

坐骨神经,髂骨,坐骨神经元,坐骨神经节

Definitions

n.名词 noun

1
plural is·chi·a [is-kee-uh]. /ˈɪs ki ə/. Anatomy.
- : the lower portion of either innominate bone.
- : either of the bones on which the body rests when sitting.

In the pelvic girdle the ilium corresponds to the scapula, the ischium to the coracoid, the pubis to the clavicle.
They are unknown in any other existing animals, unless present in Crocodiles, in which ischium and pubis are always undivided.
There is some difference in the pubis and ischium which is more conspicuous in form than in direction of the bones.
The pubis is slender, and the ischium is elevated and robust.
The body of the ischium in this case was fractured and a rent in the bladder was caused by a sharp projecting piece of bone.