# perizonium

> English word · Noun

## Definitions
1. A thin membrane surrounding the auxospore of a diatom.

## Etymology
From peri- (“around”) + Ancient Greek ζώνη (zṓnē, “girdle”) + -ium (“structure”).

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