Word Study
ischium
CIDE DICTIONARY
ischium, n. [L., Gr. 'ischi`on.].
- The ventral and posterior of the three principal bones composing either half of the pelvis; seat bone; the huckle bone. [1913 Webster]
- One of the pleuræ of insects. [1913 Webster]
OXFORD DICTIONARY
ischium, n. (pl. ischia) the curved bone forming the base of each half of the pelvis.
Derivative
ischial adj.
Etymology
L f. Gk iskhion hip-joint: cf. SCIATIC
For further exploring for "ischium" in Webster Dictionary Online