English
Detailed Synonyms for promethium in English
promethium:
promethium [the ~] noun
-
the 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 1the Pm; the atomic number 61; the 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 1