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contrast medium

noun, Medicine/Medical
1.
a radiopaque substance injected into a part of the body, as the stomach or duodenum, to provide a contrasting background for the tissues in an x-ray or fluoroscopic examination.
Origin
1950-1955
1950-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for contrast-medium

contrast medium

noun
1.
(med) a radiopaque substance, such as barium sulphate, used to increase the contrast of an image in radiography
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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contrast-medium in Medicine

contrast medium n.
A substance, such as barium or air, used in radiography to increase the contrast of an image. A positive contrast medium absorbs x-rays more strongly than the tissue or structure being examined; a negative contrast medium, less strongly.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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contrast-medium in Science
contrast medium
  (kŏn'trāst')   
A substance, such as barium or air, used in radiologic studies to increase the contrast of an image. In x-ray imaging, a positive contrast medium absorbs x-rays more strongly than the tissue or structure being examined; a negative contrast medium, less strongly.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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