zirconia
nounCubic zirconia.
nounAn oxid, ZrO, of the metal zirconium, resembling alumina in appearance. It is so hard as to scratch glass.
nounThis earth is now of industrial value as the chief material used in the โglowerโ of the Nernst incandescent electric lamp. The glower commonly consists of about 85 per cent. zirconia and 15 per cent. yttria or mixed earths of that class.
nounThe oxide of zirconium (ZrO2), 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.
nounA colorless form of zirconia similar in appearance and refractivity to diamond, and used as a substitute for diamonds in inexpensive jewelry; — also known by the acronym
The
a white crystalline oxide; used in refractories and in insulation and abrasives and enamels and glazes