from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The indigo plant or the blue dye obtained from it.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The indigo shrub; or the indigo dye obtained from the plant.
  • n. Any imine in which the N-radical is a phenyl (or substituted phenyl) group.

from the GNU version of the Collaborative International Dictionary of English

  • n. A West Indian plant (Indigofera anil), one of the original sources of indigo; also, the indigo dye.

from The Century Dictionary and Cyclopedia

  • n. A somewhat woody leguminous plant, Indigoferȧ Anil, from whose leaves and stalks the West Indian indigo is made.
  • n. Indigo.
  • n. A derivative of aniline containing the group NC6H5.
  • n. A Cuban name of the blue variety of the vaqueta, a bass-like fish of the West Indies, Hypoplectrus unicolor (variety indigo of Poey).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a blue dye obtained from plants or made synthetically
  • n. shrub of West Indies and South America that is a source of indigo dye


French, from Portuguese, from Arabic an-nīl, the indigo plant : al-, the + Persian nīl (from Sanskrit nīlī, from nīla-, dark blue).
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle French anil, Portuguese anil. (Wiktionary)



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