from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A silvery metallic element, not a rare earth but occurring in nearly all rare-earth minerals, used in various metallurgical applications, notably to increase the strength of magnesium and aluminum alloys. Atomic number 39; atomic weight 88.906; melting point 1,522°C; boiling point 3,338°C; specific gravity 4.45 (25°C); valence 3. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A metallic chemical element (symbol Y) with an atomic number of 39.
from the GNU version of the Collaborative International Dictionary of English
- n. A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic number 39. Atomic weight, 88.9.
from The Century Dictionary and Cyclopedia
- n. Chemical symbol, Y; atomic weight, 89 (?). A metal, the base of the earth yttria.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
From yttria.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ytterby, (literally, "outer village") a town in Sweden. (Wiktionary)