pyroligneous acid

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A reddish-brown wood distillate containing acetic acid, methyl alcohol, acetone, and a tarry residue.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry A dark liquid, produced by the destructive distillation of wood, containing acetic acid, methanol, oils and tars; once used as a commercial source of acetic acid.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a red-brown liquid formed in distillation of wood which contains acetic acid, methanol, acetone, wood oils, and tars