PromethiumWordNet Explorer
Explore synonyms, antonyms, hypernyms, hyponyms, and semantic relationships for “promethium” powered by Princeton WordNet.
noun
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
noun
any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.