plumbago(redirected from plumbagos)
Also found in: Dictionary, Thesaurus.
plumbago(plŭm'bā`gō): see graphitegraphite
, an allotropic form of carbon, known also as plumbago and black lead. It is dark gray or black, crystalline (often in the form of slippery scales), greasy, and soft, with a metallic luster.
..... Click the link for more information. .
One of the forms under which carbon occurs in nature; electrically conductive; in powdered form, used as a lubricant.