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ISCHIUM

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is⋅chi⋅um

  [is-kee-uhm]
Use ISCHIUM in a Sentence
–noun, plural -chi⋅a  [-kee-uh] . Anatomy.
1. the lower portion of either innominate bone.
2. either of the bones on which the body rests when sitting.
Origin:
1640–50; < L < Gk ischíon hip-joint

Related forms:
is⋅chi⋅ad⋅ic  [is-kee-ad-ik] , is⋅chi⋅at⋅ic  [is-kee-at-ik] , is⋅chi⋅al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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is·chi·um   (ĭs'kē-əm)   
n.   pl. is·chi·a (-kē-ə)
The lowest of the three major bones that constitute each half of the pelvis.

[Latin, hip joint, from Greek iskhion.]
is'chi·al (-əl) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

ischium 
"the seat bone," 1646, from L., from Gk. iskhion "hip joint," in pl., "the hips," probably from iskhi "loin," of unknown origin.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: is·chi·um
Pronunciation: 'is-kE-&m
Function: noun
Inflected Form: plural is·chia /-&/
: the dorsal and posterior of the three principal bones composing either half of the pelvis consisting in humans of a thick portion, a large rough eminence on which the body rests when sitting, and aforwardly directed ramus which joins that of the pubis
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

ischium is·chi·um (ĭs'kē-əm)
n. pl. is·chi·a (-kē-ə)
The lowest of the three major bones that constitute each half of the pelvis, distinct at birth but later becoming fused with the ilium and pubis. Also called ischial bone.

is'chi·ad'ic (-ād'ĭk) adj.
is'chi·al (-əl) adj.
is'chi·at'ic (-āt'ĭk) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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