gas water

Noun

 * 1) Water through which gas has been passed for purification, and used for the manufacture of sal ammoniac, carbonate of ammonia, and Prussian blue.
 * 2) * 1852-1866,, Cyclopaedia of Useful Arts and Manufactures
 * The tar and ammoniacal liquor or gas water are collected in the tar cistern, in which the tar occupies the lowest position.