Source : Webster's Revised Unabridged Dictionary (1913)

Aniline \An"i*line\ (?; 277), n. [See {Anil}.] (Chem.)
   An organic base belonging to the phenylamines. It may be
   regarded as ammonia in which one hydrogen atom has been
   replaced by the radical phenyl. It is a colorless, oily
   liquid, originally obtained from indigo by distillation, but
   now largely manufactured from coal tar or nitrobenzene as a
   base from which many brilliant dyes are made.

Aniline \An"i*line\, a.
   Made from, or of the nature of, aniline.

Source : WordNet®

aniline
     n : oily poisonous liquid amine obtained from nitrobenzene and
         used to make dyes and plastics and medicines [syn: {aniline
         oil}, {aminobenzine}, {phenylamine}]