TERBIUM
terbium, Tb, atomic number
(noun) a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
Source: WordNet® 3.1
Etymology
Noun
terbium (uncountable)
A metallic chemical element (symbol Tb) with an atomic number of 65: a soft, silvery-white, rare earth metal that is malleable and ductile.
Anagrams
• imbrute
Source: Wiktionary
Ter"bi*um, n. Etym: [NL., fr. Ytterby, in Sweden. See Erbium.] (Chem.)
Definition: A rare metallic element, of uncertain identification, supposed to exist in certain minerals, as gadolinite and samarskite, with other rare ytterbium earth. Symbol Tr or Tb. Atomic weight 150.
Source: Webster’s Unabridged Dictionary 1913 Edition
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