D defs.my
Entry 7 senses Webster, 1913

Equalizer

/ē′kwə-lī′zər/ · E·qual·i·zer · IPA /ˈi.kwəˌlaɪ.zəɹ/
01 n. One who, or that which, equalizes anything.
  1. 1.
    One who, or that which, equalizes anything.
  2. 2.
    same as Equalizing bar. See: Equalizing bar
  3. 3.
    A device, as a bar, for operating two brakes, esp. a pair of hub brakes for an automobile, with equal force.
  4. 4.
    Any device for equalizing the pull of electromagnets; also, a conductor of low resistance joining the armature ends of the series field coils of dynamos connected in parallel.(Elec.)
  5. 5.
    A sliding panel to preserve the lateral stability of an aëroplane.(Aëronautics)
  6. 6.
    a device or circuit within a sound-reproducing system that reproduces the original frequency distribution of the sound before recording by compensating for inequialities in the frequency response of the system.(Electronics)
  7. 7.
    a gun.[slang]