# lithosphere

> English word · Noun · frequency rank #59,512

## Definitions
1. The rigid, mechanically strong, outer layer of the Earth, which is divided into twelve major tectonic plates.
2. Any similar layer of an exoplanet.

## Etymology
From litho- + -sphere.

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