DICT.TW Dictionary Taiwan
3.15.141.155
Search for:
▼[Show options]
[Pronunciation] [Help] [Database Info] [Server Info]

1 definition found

From: WordNet (r) 2.0

 atomic number 86
      n : 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 [syn: radon, Rn]