# plasmasphere

> English word · Noun

## Definitions
1. The inner region of the magnetosphere, containing relatively cold, dense plasma, above the ionosphere

## Etymology
From plasma + -sphere.

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