Source : Webster's Revised Unabridged Dictionary (1913)

Iridoline \I*rid"o*line\, n. [Iridescent + L. oleum oil.]
   (Chem.)
   A nitrogenous base {C10H9N}, extracted from coal-tar naphtha,
   as an oily liquid. It is a member of the quinoline series,
   and is probably identical with {lepidine}.