Definitions for thuliumˈθu li əm
This page provides all possible meanings and translations of the word thulium
Random House Webster's College Dictionary
thu•li•umˈθu li əm(n.)
a rare-earth metallic element found in gadolinite and other uncommon minerals.
Ref: Symbol: Tm; 2
Origin of thulium:
< F (1879), after Thule , taken as a name for ancient Scandinavia; see -ium2
thulium, Tm, atomic number 69(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
a metallic chemical element (symbol Tm) with an atomic number of 69.
Origin: Thule (as a poetic way to say Scandinavia) + -ium
a rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite
Thulium is a chemical element that has the symbol Tm and atomic number 69. It is the second least abundant of the lanthanides after promethium, which is only found in trace quantities on Earth. Thulium is an easily workable metal with a bright silvery-gray luster. It is fairly soft and slowly tarnishes in air. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices and in solid-state lasers. It has no significant biological role and is not particularly toxic.
U.S. National Library of Medicine
Thulium. An element of the rare earth family of metals. It has the atomic symbol Tm, atomic number 69, and atomic weight 168.93.
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