Plum-bā’go, n.
n. [Lat., fr. plumbum, lead.] (Min.) A mineral consisting of carbon, with usually, but not necessarily, a little iron. It is used for pencils, &c., and is popularly called black-lead.
n. [Lat., fr. plumbum, lead.] (Min.) A mineral consisting of carbon, with usually, but not necessarily, a little iron. It is used for pencils, &c., and is popularly called black-lead.