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“plumbago”
plumbago (s), plumbagos (pl) (noun forms)
1. A crystalline substance said to be found in the root of a certain plant of the Leadwort (Plumbago) family.
2. Graphite; a soft, steel-gray to black, hexagonally crystallized allotrope of carbon with a metallic luster and a greasy feel, used in lead pencils, lubricants, paints, and coatings; which is fabricated into a variety of forms; such as, molds, bricks, electrodes, crucibles, and rocket nozzles. Also called black lead.
3. A drawing made by an instrument with a lead point.
2. Graphite; a soft, steel-gray to black, hexagonally crystallized allotrope of carbon with a metallic luster and a greasy feel, used in lead pencils, lubricants, paints, and coatings; which is fabricated into a variety of forms; such as, molds, bricks, electrodes, crucibles, and rocket nozzles. Also called black lead.
3. A drawing made by an instrument with a lead point.
This entry is located in the following unit:
plumb-, plumbo-, plumbi- +
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