\Mas"si*cot\, n. [F. massicot; E. masticot is a
corruption.] (Chem.)
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.
Note: Massicot is sometimes used by painters, and also as a
      drier in the composition of ointments and plasters.