Thulium

//ˈθjuːliəm// noun

Definitions

Noun
  1. 1
    A metallic chemical element (symbol Tm) with atomic number 69: a fairly soft, easily workable metal with a bright silvery-gray lustre. uncountable
  2. 2
    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 wordnet

Etymology

From Thule (a poetic name for Scandinavia) + -ium.

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