- (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.
- 1952: Besides orpiment, already referred to, one occasionally gets mention of massicot, a yellow lead paint. — L.F. Salzman, Building in England, p. 169.
massicot m (plural massicots)