# PPI

> English word · Noun · frequency rank #31,714

## Definitions
1. Initialism of producer price index.
2. Initialism of pixels per inch.
3. Initialism of proton-pump inhibitor.
4. Initialism of protein–protein interaction.
5. Initialism of patient and public involvement.
6. Initialism of personal priesthood interview.
7. Initialism of payment protection insurance.
8. Initialism of positive polarity item.

## Easily confused with
- **PR** (https://plainspell.com/en/vs/ppi-vs-pr)
- **pt** (https://plainspell.com/en/vs/ppi-vs-pt)
- **PS** (https://plainspell.com/en/vs/ppi-vs-ps)
- **PU** (https://plainspell.com/en/vs/ppi-vs-pu)
- **PV** (https://plainspell.com/en/vs/ppi-vs-pv)
- **PW** (https://plainspell.com/en/vs/ppi-vs-pw)
- **PX** (https://plainspell.com/en/vs/ppi-vs-px)
- **put** (https://plainspell.com/en/vs/ppi-vs-put)
- **pro** (https://plainspell.com/en/vs/ppi-vs-pro)
- **pub** (https://plainspell.com/en/vs/ppi-vs-pub)
- **ppl** (https://plainspell.com/en/vs/ppi-vs-ppl)
- **pup** (https://plainspell.com/en/vs/ppi-vs-pup)
- **pun** (https://plainspell.com/en/vs/ppi-vs-pun)
- **PSA** (https://plainspell.com/en/vs/ppi-vs-psa)
- **PTS** (https://plainspell.com/en/vs/ppi-vs-pts)
- **psi** (https://plainspell.com/en/vs/ppi-vs-psi)
- **PSG** (https://plainspell.com/en/vs/ppi-vs-psg)
- **PPP** (https://plainspell.com/en/vs/ppi-vs-ppp)
- **PST** (https://plainspell.com/en/vs/ppi-vs-pst)
- **PSP** (https://plainspell.com/en/vs/ppi-vs-psp)

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