noun
a substance containing barium that a doctor gives sb to swallow before an X-ray because it makes organs in the body easier to see
noun
a substance containing barium that a doctor gives sb to swallow before an X-ray because it makes organs in the body easier to see
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005