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 qub?i, 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 mashaqūnīyā ) ( from Syriac mešāh qunyā glaze of ashes ) (Syriac mešāh unguent, salve ) ( from mšah to anoint mšh) (Greek koniā ashes, sand ) (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