# periplasm

> English word · Noun · IPA /ˈpɛɹiˌplæzəm/

## Definitions
1. The region between the plasma membrane and the outer membrane or cell wall.

## Etymology
From peri- + -plasm. Coined by Peter D. Mitchell in 1961.

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