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back +‎ plate


backplate (plural backplates)

  1. A plate protecting a fighting person's back.
  2. (diving) A plate harnessed to a diver's back, to which the gas cylinders are attached.
  3. A metal plate on the rear of a computer's casing, used to cover a port or slot.
  4. A wood or metal plate that serves as a backing for an object.
  5. (Britain, automotive) A rigid metal plate inside the brake drum, which supports the wheel cylinder, brake shoes, and other parts of a drum brake.
  6. Part of a condenser microphone that sits behind the diaphragm and which acts, in conjunction with the diaphragm, as a sort of variable capacitor.