Promethium

//pɹoʊˈmiːθiəm// noun

Definitions

Noun
  1. 1
    A metallic chemical element (symbol Pm) with an atomic number of 61. uncountable
  2. 2
    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 wordnet

Etymology

1945. From the name of the Greek god Prometheus, who stole the fire from Mount Olympus and brought it down to mankind + -ium.

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