Definition of indigo
- n. - A kind of deep blue, one of the seven prismatic colors.
- n. - A blue dyestuff obtained from several plants belonging to
very different genera and orders; as, the woad, Isatis tinctoria,
Indigofera tinctoria, I. Anil, Nereum tinctorium, etc. It is a dark
blue earthy substance, tasteless and odorless, with a copper-violet
luster when rubbed. Indigo does not exist in the plants as such, but is
obtained by decomposition of the glycoside indican.
- a. - Having the color of, pertaining to, or derived from,
indigo.