a lead ore, including lead oxide ( litharge) or lead sulfide ( galena); or graphite (black lead). [ Lavoisier, Priestley, Thenard

Powdered graphite. See Printing Back.

Plumbago is a genus of 10-20 species of flowering plants in the family Plumbaginaceae, native to warm temperate to tropical regions of the world. Common names include plumbago and leadwort. The name Plumbago is derived from Latin plumbum ("lead"), either from the lead-blue flower colour of some species (OED), or from the plant at one time being a supposed cure for lead poisoning (Huxley 1992).