a soft, powdery mineral, PbO, used in making rubber, glass, etc.; lead oxide
Origin of massicotMiddle English masticote, altered (infl. by mastik, mastic) ; from Middle French ; from Italian marzacotto ; from Spanish mezacote ; from Arabic shabb qubṭi, Coptic alum: see Coptic
Origin of massicotMiddle English masticot, from Middle French massicot, marcicotte, perhaps ultimately partly from Arabic martak, litharge (probably from Middle Persian murdag, dead (probably used metaphorically of the byproducts of smelting; compare Persian murdāsang, dross of lead murda, dead + sang, stone), from Old Persian marta-, from mariya-, to die; see mer- in Indo-European roots) and partly from Old Italian marzacotto, potter's glaze of lead oxide, sand, and potash (from alteration (influenced by Old Italian cotto, cooked) of Arabic mas&hlowdot;aqūnīyā, from Syriac mešā&hlowdot; qunyā, glaze of ashes : Syriac mešā&hlowdot;, unguent, salve from mša&hlowdot;, to anoint; see mš&hlowdot; in Semitic roots + Greek koniā, ashes, sand; akin to Latin cinis, ashes).
- (chemistry) 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.
- Note Massicot is sometimes used by painters, and also as a drier in the composition of ointments and plasters.
French massicot; English masticot is a corruption