terbium
[tur-bee-uh m]
- a rare-earth, metallic element present in certain minerals and yielding colorless salts. Symbol: Tb; atomic number: 65; atomic weight: 158.924; specific gravity: 8.25.
Origin of terbium
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Historical Examples
Erbium, a rare metal found along with yttrium, terbium, and other rare elements in some rare minerals.
The New Gresham EncyclopediaVarious
(c.) Yttria (YO) occurs only in a few rare minerals, and usually in company with terbium and erbium.
Terbium, ter′bi-um, n. a rare metal found in certain yttrium minerals.
terbium
- a soft malleable silvery-grey element of the lanthanide series of metals, occurring in gadolinite and monazite and used in lasers and for doping solid-state devices. Symbol: Tb; atomic no: 65; atomic wt: 158.92534; valency: 3 or 4; relative density: 8.230; melting pt: 1356°C; boiling pt: 3230°C
Word Origin
C19: from New Latin, named after Ytterby, Sweden, village where it was discovered
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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terbium
(tûr′bē-əm)
- A soft metallic rare-earth element used in x-ray tubes. Atomic number 65.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
terbium
[tûr′bē-əm]
- A soft, silvery-gray metallic element of the lanthanide series. It is used in color television tubes, x-ray machines, and lasers. Atomic number 65; atomic weight 158.925; melting point 1,356°C; boiling point 3,123°C; specific gravity 8.229; valence 3, 4. See Periodic Table.
The American Heritage® Science Dictionary
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