Dictionary » I » Ischium



noun, plural: ischial bones

(1) (anatomy) The part that forms the lower and back portion of the hip bone.

(2) (entomology) One of the pleurae of an insect.


In anatomy, the ischium is found on either side of the hip bone, just below the ilium and behind the pubis. It is made up of three portions:

  • body of ischium
  • superior ramus of the ischium
  • inferior ramus of the ischium

Word origin: ischion means hip


  • seat bone (anatomy)
  • huckle bone (anatomy)
  • ischial bone (anatomy)

See also: hip bone

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Results from our forum

What is this? REWARD!!!

... puvic bones (The slender bone almost horizontal in the picture 112sm). You can see the the acetabulum, wich is the concavity on the side of the ischium were the head of the femur fits. Chek any ornithology book and you will see what´s in your hands. if you want to know wich bird species it belongs ...

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by bio-loquita
Thu Feb 02, 2006 8:24 pm
Forum: Zoology Discussion
Topic: What is this? REWARD!!!
Replies: 56
Views: 29573

ischiopubic ratio??

"Ischiopubic ratio" is a ratio of ischium:pubicum. You know, this comes from trio ischium-illium-pubicum (pubis) from pelvic bone 8) Look at the figure for the detail. Click the pic to view the full-size :) http://fulton.edzone.net/cites/winkler-science/team1/chapter6/image30.gif

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by Dr.Stein
Wed Jan 25, 2006 11:55 am
Forum: Human Biology
Topic: ischiopubic ratio??
Replies: 7
Views: 3598

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