English Dictionary: thulium | by the DICT Development Group |
3 results for thulium | |
From WordNet (r) 3.0 (2006) [wn]: | |
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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. |