barium

barium
[ˈbɛːrɪəm]
noun

[mass noun]the chemical element of atomic number 56, a soft white reactive metal of the alkaline earth group(Symbol: Ba)
（化学元素）钡(符号: Ba)
■a mixture of barium sulphate and water, opaque to X-rays, which is swallowed to permit radiological examination of the stomach or intestines
（作肠胃检查时吞食的）硫酸钡和水的混合物
[as modifier]a barium meal.
钡餐。
Barium compounds are used in water purification, the glass industry, and pigments, and as an ingredient of signal flares and fireworks, to which they give a bright yellowish-green colour. Barium oxide is a component of high-temperature superconductors

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