Thesaurus: promethium
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
Related headwords
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Definitions
- 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
- 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