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