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A reddish-brown wood distillate containing acetic acid, methyl alcohol, acetone, and a tarry residue. Also called wood vinegar.
(Elements & Compounds) the crude reddish-brown acidic liquid obtained by the distillation of wood and containing acetic acid, methanol, and acetone. Also called: wood vinegar
py•ro•lig′ne•ous ac′id(ˌpaɪ rəˈlɪg ni əs)
a yellowish liquid distilled from wood, composed of acetic acid, acetone, and methyl alcohol: used for smoking meats.