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Thulium
//ˈθjuːliəm// noun
Definitions
Noun
- 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 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.
See also for "thulium"
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