| plumbagin | <chemistry> A crystalline substance said to be found in the root of a certain plant of the Leadwort (Plumbago) family. Origin: L. Plumbago leadwort, fr. Plumbum lead; cf. F. Plombagin. Source: Websters Dictionary (01 Mar 1998) |
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| plumbagineous | <botany> Pertaining to natural order (Plumbagineae) of gamopetalous herbs, of which plumbago is the type. The order includes also the marsh rosemary, the thrift, and a few other genera. Source: Websters Dictionary (01 Mar 1998) |