contrast medium


nounMedicine/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 of contrast medium

1
First recorded in 1950–55

Words Nearby contrast medium

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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

Scientific definitions for contrast medium

contrast medium

[ kŏntrăst′ ]


  1. 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.

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