thulium : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: thulium	by the DICT Development Group
3 results for thulium
From WordNet (r) 3.0 (2006) [wn]:
thulium n 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 Synonym(s): thulium, Tm, atomic number 69
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Thulium \Thu"li*um\, n. [NL. See {Thule}.] (Chem.) A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite.
From The Elements (22Oct97) [elements]:
thulium Symbol: Tm Atomic number: 69 Atomic weight: 168.934 Soft grey metallic element that belongs to the lanthanoids. One natural isotope exists, Tm-169, and seventeen artificial isotopes have been produced. No known uses for the element. Discovered in 1879 by Per Theodor Cleve.