Source : Webster's Revised Unabridged Dictionary (1913)

Ketol \Ke"tol\ (k[=e]"t[=o]l), n. [Ketone + indol.] (Chem.)
   One of a series of series of complex nitrogenous substances,
   represented by methyl ketol and related to indol.

   {Methyl ketol}, a weak organic base, obtained as a white
      crystalline substance having the odor of f[ae]ces.