genus of tropical natural herbs and shrubs having odd-pinnate leaves and spurred flowers in lengthy racemes or surges
- A genus of leguminous plants having numerous species, mainly in tropical nations, many of them producing indigo, esp. Indigofera tinctoria, and I. Anil.
(n.) A genus of leguminous flowers having many types, mainly in tropical nations, several of all of them yielding indigo, esp. tinctoria, and I. Anil.
Fritzsche showed that by treating indigo with caustic potash it yielded an oil, which he named aniline, from the specific name of one of the indigo-yielding plants, Indigofera anil, anil being derived from the Sanskrit nila, dark-blue, and nila, the indigo plant.