'massicot' definitions:

Definition of 'massicot'

noun

The mineral form of lead monoxide; in the form of yellow powder it is used as a pigment [syn: massicot, massicotite]

From: GCIDE

Litharge \Lith"arge\ (l[i^]th"[.a]rj), n. [OE. litarge, F. litharge, L. lithargyrus, Gr. liqa`rgyros the scum or foam of silver; li`qos stone + 'a`rgyros silver. Litharge is found in silverbearing lead ore.] (Chem.) Lead monoxide; a yellowish red substance, obtained as an amorphous powder, or crystallized in fine scales, by heating lead moderately in a current of air or by calcining lead nitrate or carbonate. It is used in making flint glass, in glazing earthenware, in making red lead or minium, etc. Called also massicot. [1913 Webster]

From: GCIDE

massicot \mas"si*cot\, n. [F. massicot; E. masticot is a corruption.] (Chem.) Lead monoxide (also called 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. It is also called lead oxide yellow, as opposed to red lead, which is lead tetroxide Pb3O4. [1913 Webster +PJC]
Note: Massicot is sometimes used by painters, and also as a drier in the composition of ointments and plasters. [1913 Webster]