What is "coal-tar creosote"

Creosote \Cre"o*sote\ (kr[=e]"[-o]*s[=o]t), n. [Gr. kre`as, gen. kre`ws, flesh + sw`zein to preserve.] (Chem.) Wood-tar oil; an oily antiseptic liquid, of a burning smoky taste, colorless when pure, but usually colored yellow or brown by impurity or exposure. It is a complex mixture of various phenols and their ethers, and is obtained by the distillation of wood tar, especially that of beechwood.

Note: It is remarkable as an antiseptic and deodorizer in the preservation of wood, flesh, etc., and in the prevention of putrefaction; but it is a poor germicide, and in this respect has been overrated. Smoked meat, as ham, owes its preservation and taste to a small quantity of creosote absorbed from the smoke to which it is exposed. Carbolic acid is phenol[1] proper, while creosote is a mixture of several phenols.

Coal-tar creosote (Chem.), a colorless or yellow, oily liquid, obtained in the distillation of coal tar, and resembling wood-tar oil, or creosote proper, in composition and properties.

n. a dark oily liquid obtained by distillation of coal tar; used as a preservative for wood [syn: creosote]