noun Pathology.
local deficiency of blood supply produced by vasoconstriction or local obstacles to the arterial flow.
Also, ischaemia.

1855–60; < Greek ísch(ein) to suppress, check + -emia

ischemic [ih-skee-mik, -skem-ik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
ischaemia or ischemia (ɪˈskiːmɪə)
pathol an inadequate supply of blood to an organ or part, as from an obstructed blood flow
[C19: from Greek iskhein to restrict, + -emia]
ischemia or ischemia
[C19: from Greek iskhein to restrict, + -emia]
ischaemic or ischemia
ischemic or ischemia

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

ischemia is·che·mi·a (ĭ-skē'mē-ə)
A decrease in the blood supply to a bodily organ, tissue, or part caused by constriction or obstruction of the blood vessels.

i·sche'mic 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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Example sentences
Surgeons placed me in a coma for several days following mesenteric ischemia.
In this case, because of the distance involved, the ischemia time would be
  about five hours.
Such oxygen deprivation in vital cells is called ischemia.
Intestinal ischemia is a serious complication of mesenteric venous thrombosis.
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