Ischium

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Ischion \Is"chi*on\, Ischium \Is"chi*um\, n. [L., Gr.
     'ischi`on.]
     1. (Anat.) The ventral and posterior of the three principal
        bones composing either half of the pelvis; seat bone; the
        huckle bone.
        [1913 Webster]


  
     2. (Zool.) One of the pleur[ae] of insects.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  ischium
       n : one of the three sections of the hipbone; situated below the
           ilium [syn: {ischial bone}, {os ischii}]
       [also: {ischia} (pl)]