zinc oxide

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An amorphous white or yellowish powder, ZnO, used as a pigment, in compounding rubber, in the manufacture of plastics, and in pharmaceuticals and cosmetics.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry An amorphous solid, ZnO, white when pure but often pale yellow, used in pigments and cosmetics

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun oxide of zinc; a white powder used as a pigment or in cosmetics or glass or inks and in zinc ointment