Word Study
plumbagin
CIDE DICTIONARY
plumbagin, n. [L. plumbago leadwort, fr. plumbum lead; cf. F. plombagin.].
A crystalline substance said to be found in the root of a certain plant of the Leadwort (Plumbago ) family. [1913 Webster]
For further exploring for "plumbagin" in Webster Dictionary Online