# lithology

> English word · Noun · frequency rank #90,667

## Definitions
1. The study of rocks, with particular emphasis on their description and classification.
2. The general composition of a rock or rock sequence.

## Etymology
From litho- + -ology.

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