# PID

> English word · Noun · frequency rank #35,879

## Definitions
1. Initialism of pelvic inflammatory disease.
2. Initialism of personal identification device.
3. Initialism of principal ideal domain.
4. Initialism of process identifier.
5. Initialism of proportional integral derivative.
6. Initialism of piping and instrumentation diagram.
7. Initialism of photoionization detector.

## Easily confused with
- **PM** (https://plainspell.com/en/vs/pid-vs-pm)
- **PP** (https://plainspell.com/en/vs/pid-vs-pp)
- **PR** (https://plainspell.com/en/vs/pid-vs-pr)
- **pt** (https://plainspell.com/en/vs/pid-vs-pt)
- **PS** (https://plainspell.com/en/vs/pid-vs-ps)
- **po** (https://plainspell.com/en/vs/pid-vs-po)
- **PL** (https://plainspell.com/en/vs/pid-vs-pl)
- **PU** (https://plainspell.com/en/vs/pid-vs-pu)
- **PK** (https://plainspell.com/en/vs/pid-vs-pk)
- **PV** (https://plainspell.com/en/vs/pid-vs-pv)
- **PJ** (https://plainspell.com/en/vs/pid-vs-pj)
- **PW** (https://plainspell.com/en/vs/pid-vs-pw)
- **PX** (https://plainspell.com/en/vs/pid-vs-px)
- **put** (https://plainspell.com/en/vs/pid-vs-put)
- **pro** (https://plainspell.com/en/vs/pid-vs-pro)
- **pop** (https://plainspell.com/en/vs/pid-vs-pop)
- **pot** (https://plainspell.com/en/vs/pid-vs-pot)
- **pin** (https://plainspell.com/en/vs/pid-vs-pin)
- **pit** (https://plainspell.com/en/vs/pid-vs-pit)
- **pub** (https://plainspell.com/en/vs/pid-vs-pub)

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