1) Countercurrent 
• (n.) A check; a relapse; a discouragement; a setback. • (v. i.) To plow again, in the fall; -- said of prairie land broken up in the spring. • (n.) Whatever is thrown back in its course, as water.
Back'set` (-sĕt`) noun [ Back , adverb + set .] 1. A check; a relapse; a discouragement; a setback. 2. Whatever is thrown back in its course, as water. « Slackwater, or the backset caused by the overflow. Harper's Mag. » Back'set` transitive verb To plow again, in the fall; -- said of prairie land broken up in the spring. [ Western U.S.]
An American term for the liquid at the bottom of the stills after distillation. This is added to the Washback and the Mash Tun to prevent bacterial contamination.
A bow design in which the limbs face away from the archer (backward in reflex position). This would preload the limbs upon bracing.
The horizontal distance from the face of the lock to the centre line of the cylinder, key hole, knob or lever hub.
In North American whiskies, alcohol-free liquid left at the bottom of the still after distillation (see Thin stillage) is added to the mash tub and fermenter to ward off bacterial contamination.