柯林斯詞典barium meal 1. N a preparation of barium sulphate, which is opaque to X-rays, swallowed by a patient before X-ray examination of the upper part of the alimentary canal 鋇餐 返回 barium meal劍橋詞典a chemical , barium sulphate , 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 clearly 鋇餐 返回 barium meal