backplate

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