atomic number 69

Definitions of atomic number 69
  1. noun
    a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime
    synonyms: Tm, thulium
    see moresee less
    type 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.
Cite this entry
Style:
MLA
  • MLA
  • APA
  • Chicago

Copy citation
DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘atomic number 69'. Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors. Send us feedback
Word Family