a strong or violent reaction, as to some social or political change:
a backlash of angry feeling among Southern conservatives within the party.
the space between the thickness of a gear tooth and the width of the space between teeth in the mating gear, designed to allow for a film of lubricant, binding from heat expansion and eccentricity, or manufacturing inaccuracies.
play or lost motion between loosely fitting machine parts.
Angling. a snarled line on a reel, usually caused by a faulty cast.