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Any one of a group of quinone compounds obtained respectively by the oxidation of certain xylidine compounds. In general they are yellow crystalline substances.

es. -- Yellow plover (Zoöl.), the golden plover. -- Yellow precipitate (Med. Chem.), an oxide of mercury which is thrown down as an amorphous yellow powder on adding corrosive sublimate to limewater. -- Yellow puccoon. (Bot.) Same as Orangeroot. -- Yellow rail (Zoöl.), a small American rail (Porzana Noveboracensis)…

The oxide, Y2O3, or earth, of yttrium.

g cobalt glance with sand or quartz, as a dark earthy powder. It consists of crude cobalt oxide, or of an impure cobalt arseniate. It is used in porcelain painting, and in enameling pottery, to produce a blue color, and is often confounded with smalt, from which, however, it is distinct, as it contains no potash. The n…

fusible bluish white metal, which is malleable, especially when heated. It is not easily oxidized in moist air, and hence is used for sheeting, coating galvanized iron, etc. It is used in making brass, britannia, and other alloys, and is also largely consumed in electric batteries. Symbol Zn. Atomic weight 64.9 [Forme…

Native zinc oxide; a brittle, translucent mineral, of an orange-red color; -- called also red zinc ore, and red oxide of zinc.

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.

Pertaining to, containing, or resembling, zirconium; as, zirconic oxide; zirconic compounds. Zirconic acid, an acid of zirconium analogous to carbonic and silicic acids, known only in its salts.