massicot

noun1

1. •
   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.

   • Besides orpiment, already referred to, one occasionally gets mention of massicot, a yellow lead paint. — 1952