ischium
Is"chi*on, Is"chi*um, n. Etym: [L., Gr. 1. (Anat.) Defn: The ventral and posterior of the three principal bones composing either half of the pelvis; seat bone; the huckle bone. 2. (Zoöl.) Defn: One of the pleuræ of insects.
Is"chi*on, Is"chi*um, n. Etym: [L., Gr. 1. (Anat.) Defn: The ventral and posterior of the three principal bones composing either half of the pelvis; seat bone; the huckle bone. 2. (Zoöl.) Defn: One of the pleuræ of insects.