
1) Compound used in abrasives 2) Oxide 3) Zirconium dioxide 4) Zirconium oxide
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https://www.crosswordclues.com/clue/zirconia
[Sailor Moon] Places in this category are unincorporated and do not have any formally organized municipal government. ...
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http://en.wikipedia.org/wiki/Zirconia_(Sailor_Moon)

• (n.) The oxide of zirconium, obtained as a white powder, and possessing both acid and basic properties. On account of its infusibility, and brilliant luminosity when incandescent, it is used as an ingredient of sticks for the Drummomd light.
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http://thinkexist.com/dictionary/meaning/zirconia/

zirconium dioxide, an industrially important compound of zirconium and oxygen usually derived from the mineral zircon (see zirconium).[5 related articles]
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http://www.britannica.com/eb/a-z/z/9

Ceramic material used for making ferrules in fibre optic connectors.
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http://www.encyclo.co.uk/visitor-contributions.php
Zir·co'ni·a noun [ New Latin ]
(Chemistry) The oxide of zirconium, obtained as a white powder, and possessing both acid and basic properties. On account of its infusibility, and brilliant luminosity when incandescent, it is used as an ingredient of sticks for the Drummomd light.
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http://www.encyclo.co.uk/webster/Z/4

Zirconium oxide, di-
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http://www.translationdirectory.com/glossaries/glossary075.htm

ZrO2 an acid refractory up to 2500 B0C (4532 B0F) having good thermal shock resistance and low electrical resistively.
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
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