Litharge
Litharge (lith"ȧrj) , noun
[Old English litarge, French litharge, Latin lithargyrus, Greek liqa`rgyros the scum or foam of silver; li`qos stone + 'a`rgyros silver. Litharge is found in silverbearing lead ore.]
(Chemistry) 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.