radon

n. 氡

氡Rn

學術名詞

氡：化學元素、高中化學、電機工程、礦冶工程、動物學、食品科技
氡｛為鐳衰變時衍生之一種無色氣體｝：金屬材料

英文釋義

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