
1) Heavy, insoluble powder 2) Oxide used in picture tubes 3) Powder used in color TV tubes 4) Powder used in lasers 5) Rare-earth oxide
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• (n.) The oxide, Y2O3, or earth, of yttrium.
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http://thinkexist.com/dictionary/meaning/yttria/

a white, water-insoluble powder, Y
2O
3, used chiefly in incandescent gas and acetylene mantles.
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http://www.encyclo.co.uk/local/20728
Yt'tri·a noun [ New Latin See
Yttrium .]
(Chemistry) The oxide, Y
2 O
3 , or earth, of yttrium.
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http://www.encyclo.co.uk/webster/Y/7

Yttrium oxide
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http://www.translationdirectory.com/glossaries/glossary075.htm

a white, water-insoluble powder, YO, used chiefly in incandescent gas and acetylene mantles. Also called
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https://www.infoplease.com/dictionary/yttria
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