Search Result for "atomic number 61":
Wordnet 3.0

NOUN (1)

1. 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, atomic number 61]



WordNet (r) 3.0 (2006):

atomic number 61
    n 1: 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, atomic number 61]