pyroligneous , pyrolignic adj (of a substance) produced by the action of heat on wood, esp. by destructive distillation (C18: from French pyroligneux, from pyro- + ligneux ligneous)
pyroligneous acid
n the crude reddish-brown acidic liquid obtained by the distillation of wood and containing acetic acid, methanol, and acetone, (Also called)
wood vinegar