Radium



GRE

解释

GRE 红宝书

• n. 镭
• ［英］ n. 镭 ( a rare shining white metal)

Webster Collegiate

noun

• Usage: often attributive
• Etymology: New Latin, from Latin radius ray
• Date: 1899
• an intensely radioactive brilliant white metallic element that resembles barium chemically, occurs in combination in minute quantities in minerals (as pitchblende or carnotite), emits alpha particles and gamma rays to form radon, and is used chiefly in luminous materials and in the treatment of cancer — see element table

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