1. plumbago(n = noun.substance) black lead, graphite - used as a lubricant and as a moderator in nuclear reactors;
is a kind of atomic number 6, c, carbon
has particulars: lead, pencil lead, pencil
2. plumbago(n = noun.plant) - any plumbaginaceous plant of the genus Plumbago;
is a kind of herb, herbaceous plant
is a member of genus plumbago
1. Same as Graphite. [1913 Webster]
2. A genus of herbaceous plants with pretty salver-shaped corollas, usually blue or violet; leadwort. [1913 Webster]
plumbago, n. (pl. -os)
1 = GRAPHITE.
2 any plant of the genus Plumbago, with grey or blue flowers. Also called LEADWORT.
Etymology:
L f. plumbum LEAD(2)