# exobase

> English word · Noun

## Definitions
1. The base altitude of the exosphere, where particles often escape the atmosphere as it blends into space.

## Etymology
From exo- + base.

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