ETYM French anil, Spanish anîl, or Portu. anil; all from Arabic an-nîl, for al-nîl the indigo plant, from Skr. nîla dark blue, nîlî indigo, indigo plant. Related to Lilac.
1. A blue dye obtained from plants or made synthetically; SYN. indigo, indigotin.
2. Shrub of West Indies and South America that is a source of indigo dye; SYN. Indigofera suffruticosa, Indigofera anil.
3. W Indian plant yielding indigo; indigo.