# backplate

> English word · Noun · frequency rank #97,819

## Definitions
1. A plate protecting a fighting person's back.
2. A plate harnessed to a diver's back, to which the gas cylinders are attached.
3. The metal plate on the rear of a computer's casing, where the ports are found.
4. A wood or metal (or glass, etc) plate that serves as a backing for an object.
5. 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.

## Etymology
From back + plate.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/backplate