Definition of contrast medium in US English:

contrast medium


  • A substance introduced into a part of the body in order to improve the visibility of internal structure during radiography.

    • ‘The only complications that may arise from a CT scan are related to the contrast medium.’
    • ‘You may swallow the contrast medium, insert it as an enema or receive it as an injection into a vein.’
    • ‘This allowed for studying of any impact of the washout of the contrast medium from the blood pool.’
    • ‘Also, this method does not require a physician to administer the contrast medium.’
    • ‘When contrast medium is used, adjacent vascular structures can be identified.’


contrast medium

/ˈkäntrast ˌmēdēəm//ˈkɑntræst ˌmidiəm/