{ Pyr′o‐lig″ne‐ous (?), 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.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.