Definition of litharge in English:

litharge

Pronunciation /ˈliTHärj/ /ˈlɪθɑrdʒ/ /liˈTHärj/ /lɪˈθɑrdʒ/

noun

  • Lead monoxide, especially a red form used as a pigment and in glass and ceramics.

    Chemical formula: PbO

    ‘The ore, which ran to 25 percent silver, was melted in a small clay or stone furnace called a guaira or wayra, using lead oxide (litharge) as a flux.’
    • ‘Fluxing agents include lead oxide or litharge which is used as a collector of precious metals.’

Origin

Middle English from Old French litarge, via Latin from Greek litharguros, from lithos ‘stone’ + arguros ‘silver’.