In"du*line (?), n. [Perh. fr. indigo.] Chem. (a)
Any one of a large series of aniline dyes, colored blue or violet, and represented by aniline violet.
A dark green amorphous dyestuff, produced by the oxidation of aniline in the presence of copper or vanadium salts; -- called also aniline black.
© Webster 1913.