# mesosaur

> English word · Noun

## Definitions
1. Any of a group of small aquatic reptiles, from the early Permian period, of the order †Mesosauria.

## Etymology
From meso- + -saur.

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