Source : Webster's Revised Unabridged Dictionary (1913)

Pyroligneous \Pyr`o*lig"ne*ous\, Pyrolignic \Pyr`o*lig"nic\, a.
   [Pyro-+ L. lignum wood: cf. F. pyroligneux.] (Old Chem.)
   Pertaining to, or designating, the acid liquid obtained in
   the distillation of wood, consisting essentially of impure
   acetic acid.

Source : WordNet®

pyrolignic
     adj : of a substance produced by the effect of heat on wood,
           especially by destructive distillation [syn: {pyroligneous}]