radon
英 ['reɪdɒn]
美['redɑn]
- n. [化学] 氡（元素符号Rn）
- n. (Radon)人名；(法、塞)拉东
英英释意
- 1. a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health