ATOMIC NUMBER 61

 Dictionary entry overview: What does atomic number 61 mean? 

• ATOMIC NUMBER 61 (noun)
  The noun ATOMIC NUMBER 61 has 1 sense:

1. 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

  Familiarity information: ATOMIC NUMBER 61 used as a noun is very rare.

 Dictionary entry details 

• ATOMIC NUMBER 61 (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting substances

Synonyms:

atomic number 61; Pm; promethium

Hypernyms ("atomic number 61" is a kind of...):

metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)