Defenition of the word promethium

• Defenition of the word promethium

  • Chemical element with symbol Pm and atomic number 61, silvery white radioactive lanthanide.
  • 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 for the word promethium

• • atomic number 61
  • Pm

Hypernyms for the word promethium

• • metal
  • metallic element

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