equalizer

Meanings

1. One who makes equal; a balancer.
2. A device that balances various quantities.
3. A goal, run, point, etc. that equalizes the score.
4. An electronic audio device for altering the frequencies of sound recordings.
5. A device, such as a bar, for operating two brakes, especially a pair of hub brakes for an automobile, with equal force.
6. Any device for equalizing the pull of electromagnets.
7. A conductor of low resistance joining the armature ends of the series field coils of dynamos connected in parallel.
8. A sliding panel to preserve the lateral stability of an aeroplane.
9. A set of arguments where two or more functions have equal values; the solution set of an equation.
10. A morphism whose codomain is the domain of a parallel pair of morphisms and which forms part of the limit of that parallel pair. Equivalently, a morphism which equalizes a parallel pair of morphisms in a limiting way, which is to say that any other morphism which equalizes that parallel pair factors through this limiting morphism; and moreover such factorization is unique.
11. A weapon, usually a blackjack or gun.

Etymology

From equalize + -er (nominal suffix: agent noun).