# NPN

> English word · Noun · frequency rank #80,712

## Definitions
1. Ellipsis of NPN transistor.
2. Initialism of non-protein nitrogen.
3. Initialism of N-propyl nitrate.

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