Ischion

Is'chi·on Is'chi*um noun [ Latin , Greek 'ischi`on .] 1. (Anat.) The ventral and posterior of the three principal bones composing either half of the pelvis; seat bone; the huckle bone. 2. (Zoology) One of the pleuræ of insects.
Found on http://www.encyclo.co.uk/webster/I/100

Ischion

• (n.) Alt. of Ischium
Found on http://thinkexist.com/dictionary/meaning/ischion/
No exact match found