DICT.TW Dictionary Taiwan
3.142.156.202
Search for:
▼[Show options]
[Pronunciation] [Help] [Database Info] [Server Info]

1 definition found

From: WordNet (r) 2.0

 atomic number 61
      n : a soft silvery metallic element of the rare earth group
          having no stable isotope; was discovered in radioactive
          form as a fission product of uranium [syn: promethium,
          Pm]