A purplish-blue colour / An indigo-colored dye obtained from certain plants (the indigo plant or woad), or a similar synthetic dye.

having a deep purplish-blue colour

plural of indigo

plural of indigo

A blue bunting of North America, Passerina cyanea.

plural of indigo bunting

(New Age) A child believed to be a next stage in human evolution; to have paranormal abilities like telepathy; or to be more empathic, independent, and creative than its peers.

plural of Indigo child

(organic chemistry) The synthetic dye indigotin used to replace natural indigo

The American herb Baptisia tinctoria, which yields a poor quality of indigo, as do several other species of the same genus.