Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The mineral form of lead monoxide, PbO.
  • n. A yellow powder, PbO, used as a pigment.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. lead monoxide, PbO, obtained as a yellow amorphous powder, the fused and crystalline form of which is called litharge; lead ocher. It is used as a pigment; also, lead oxide yellow, as opposed to red lead, which is lead tetroxide Pb3O4.

from the GNU version of the Collaborative International Dictionary of English

  • n. Lead monoxide (also called Lead protoxide), PbO, obtained as a yellow amorphous powder, the fused and crystalline form of which is called litharge; lead ocher. It is used as a pigment. It is also called lead oxide yellow, as opposed to red lead, which is lead tetroxide Pb3O4.

from The Century Dictionary and Cyclopedia

  • n. Protoxid of lead, or yellow oxid of lead, PbO.

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

  • n. the mineral form of lead monoxide; in the form of yellow powder it is used as a pigment

Etymologies

Middle English masticot, from Old French, perhaps from Old Italian marzacotto, potter's glaze (perhaps from Spanish mazacote, mortar), possibly from Arabic masḥaqūnīyā, perhaps of Greek origin.
(American Heritage® Dictionary of the English Language, Fourth Edition)
French massicot; English masticot is a corruption (Wiktionary)

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