Definitions for yttriumˈɪ tri əm
Random House Webster's College Dictionary
yt•tri•umˈɪ tri əm(n.)
a rare metallic element, found in gadolinite and other minerals.
Ref: Symbol: Y; 4
Origin of yttrium:
1815–25; yttri(a)+ -ium2
yttrium, Y, atomic number 39(noun)
a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
A metallic chemical element (symbol Y) with an atomic number of 39.
Origin: From Ytterby, (literally, "outer village") a town in Sweden.
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 weight, 89
The Nuttall Encyclopedia
a rare metal always found in combination with others, and is a blackish-gray powder; the oxide of it, yttria, is a soft whitish powder, and when ignited glows with a pure white light.
U.S. National Library of Medicine
An element of the rare earth family of metals. It has the atomic symbol Y, atomic number 39, and atomic weight 88.91. In conjunction with other rare earths, yttrium is used as a phosphor in television receivers and is a component of the yttrium-aluminum garnet (YAG) lasers.