anil noun. 
['anɪl] L16.[French or Portuguese, from Arab. an-nīl, formed as AL-2 + Arab. & Persian nīl from Sanskrit nīlī indigo, from nīla dark blue. Cf. NIL noun1.]1.  The dye indigo. 
L16.2.  The indigo shrub. 
E18-M18.3.  Chemistry. Any imine derived from aniline. Orig. more fully 
anil-compound. 
L19.  [TahlilGaran] English Dictionary ▲