Webster’s Revised Unabridged Dictionary · 1913
Litharge
Lith′arge (lĭth′ȧrj), n. [OE. litarge, F. litharge, L. lithargyrus, Gr. λιθάργυρος the scum or foam of silver; λίθος stone + ἄργυρος 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.