| / English Dictionary |
PROMETHIUM
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
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
Synonyms:
atomic number 61; Pm; promethium
Classified under:
Hypernyms ("promethium" is a kind of...):
metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)
YOU MAY ALSO LIKE
