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English definition of “barium meal”

barium meal

noun [C or U]   /ˌbeə.ri.əmˈmiːl/ US  /ˌber.i-/ UK (US barium sulphate [U])
a chemical that is swallowed by a person just before an X-ray is taken of their stomach and bowels, so that these organs can be seen clearlyMedical examination
(Definition of barium meal noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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