Plumbagin \Plum*ba"gin\ (pl[u^]m*b[=a]"j[i^]n), n. [L. plumbago
leadwort, fr. plumbum lead; cf. F. plombagin.] (Chem.)
A crystalline substance said to be found in the root of a
certain plant of the Leadwort ({Plumbago}) family.
[1913 Webster]