
1) Bone 2) Ischial bone 3) Os ischii 4) Situated below the ilium
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https://www.crosswordclues.com/clue/ischium

The ischium forms the lower and back part of the hip bone (os coxae). Situated below the ilium and behind the pubis, it is one of these three bones whose fusion creates the coxa. The superior portion of this bone forms approximately one third of the acetabulum. It is divisible into three portions: The ischial ramus joins the inferior ramus of the ...
Found on
http://en.wikipedia.org/wiki/Ischium

• (n.) The ventral and posterior of the three principal bones composing either half of the pelvis; seat bone; the huckle bone. • (n.) One of the pleurae of insects.
Found on
http://thinkexist.com/dictionary/meaning/ischium/

(from the article `bird`) ...into a single piece with the synsacrum. The ilium is the most dorsal element and the only one extending forward of the socket of the leg ... There are marked variations in the form of the pelvic girdle in the amphibians. In the frog the three parts of the hip bone (ilium, ischium, and ... ...without assis...
Found on
http://www.britannica.com/eb/a-z/i/42

A U-shaped bone at the base and on either side of the pelvis. It is fused with the ilium and the pubis in the hip socket; its lower edge meets the pubis. In primates the ischium takes most of the body's weight when sitting.
Found on
http://www.daviddarling.info/encyclopedia/I/ischium.html

(pronounced ISH-ee-um) The ischium (plural i schia) is a rod-like bone that is part of the hip, or pelvic girdle.
Found on
http://www.enchantedlearning.com/subjects/dinosaurs/glossary/

(is´ke-әm) the inferior, dorsal portion of the hip bone. It is a separate bone in early life.
Found on
http://www.encyclo.co.uk/local/21001

The inferior dorsal portion of the hip bone.
Found on
http://www.encyclo.co.uk/local/21447

One of the three sections of the hip bone.
Found on
http://www.gadsbywicks.co.uk/uploaded/3822.pdf

Type: Term Pronunciation: is′kē-ŭm, is′kē-ī, is′kē-ă Definitions: 1. The lower and posterior part of the hip bone, distinct at birth but later becoming fused with the ilium and pubis; it consists of a body, where it joins the ilium and superior ramus of the pubis to form the acetabulum, and a ramus jo...
Found on
http://www.medilexicon.com/medicaldictionary.php?t=45801

Ischium: Bone making up the lower down back part of the pelvis.
Found on
http://www.medterms.com/script/main/art.asp?articlekey=4053

The ischium is one of the three sections of bone which are fused in the adult to form the pelvis. The ischium bears the weight when sitting, and is attached to the pubis in front and to the ala, or wings, of the ilium laterally and to the back. The large openings in the ischium on either side of the pelvis, just below the pubis, are called the obtu...
Found on
http://www.probertencyclopaedia.com/browse/EI.HTM

[
n] - one of the three sections of the hipbone
Found on
http://www.webdictionary.co.uk/definition.php?query=ischium

ischium (s), ischia (pl) The lower section, or part, of the hip bone. Ischium is the bone which forms the lower and back part of the pelvis. It bears the weight of the body when sitting.
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http://www.wordinfo.info/words/index/info/view_unit/1089/

One of the three paired bones fused to form the pelvic girdle; the ischium forms the caudal and lateral portion.
Found on
https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter

ischion, socket of hip joint.
Found on
https://aclandanatomy.com/Glossary.aspx
ischial bone noun one of the three sections of the hipbone; situated below the ilium
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https://www.encyclo.co.uk/local/20974

Greek ischion = socket, because the ischium contributes more than either the ilium or pubis to the acetabulum.
Found on
https://www.encyclo.co.uk/local/21450

the lower portion of either innominate bone. See diag. under · either of the bones on which the body rests when sitting.
Found on
https://www.infoplease.com/dictionary/ischium

Bone of the hip; adjective is ischiatic, ischial, or sciatic.
Found on
https://www.ioshospital.com/orthopaedics/learnMore/glossaryOfTerms.aspx
No exact match found.