zinc oxide

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An amorphous white or yellowish powder, ZnO, used as a pigment, in compounding rubber, in the manufacture of plastics, and in pharmaceuticals and cosmetics. Also called Chinese white, zinc white.

Wiktionary

1. n. chemistry An amorphous solid, ZnO, white when pure but often pale yellow, used in pigments and cosmetics

GNU Webster's 1913

1. n. (Chem.) the oxide of zinc, ZnO, forming a light fluffy sublimate when zinc is burned; -- called also flowers of zinc, philosopher's wool, nihil album, etc. The impure oxide produced by burning the metal, roasting its ores, or in melting brass, is called also pompholyx, and tutty.

WordNet 3.0

1. n. oxide of zinc; a white powder used as a pigment or in cosmetics or glass or inks and in zinc ointment