yttrium

yt·tri·um   (ĭt'rē-əm)    n.   Symbol Y 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 yttria.] yt'tric (ĭt'rĭk) adj.

yttrium 

Main Entry: yt·tri·um
Pronunciation: 'i-trE-&m
Function: noun
: a trivalent metallic element usually included among the rare earth elementswhich it resembles chemically and with which it occurs in minerals —symbol Y; —see ELEMENT table

yttrium yt·tri·um (ĭt'rē-əm)
n.
Symbol Y
A silvery, ductile, rare-earth element used in various alloys. Atomic number 39; atomic weight 88.905; melting point 1,522°C; boiling point 3,338°C; specific gravity 4.47 (25°C); valence 3.

yttrium   (ĭt'rē-əm)  Pronunciation Key  Symbol Y A silvery metallic element found in the same ores as elements of the lanthanide series. Yttrium is used to strengthen magnesium and aluminum alloys, to provide the red color in color televisions, and as a component of various optical and electronic devices. 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 Periodic Table.

yttrium

(Y), chemical element, rare-earth metal of transition Group IIIb of the periodic table, used for red phosphors in colour television. Yttrium metal is silvery in colour, ductile, and relatively reactive; turnings of the metal ignite readily in air

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