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English definition of “barium meal”

barium meal

noun [C or U] uk   /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 from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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