# mesoderm

> English word · Noun · frequency rank #76,121

## Definitions
1. One of the three tissue layers in the embryo of a metazoan animal, which will produce, through development, many internal organs of the adult, e.g. muscles, spine and the circulatory system.

## Etymology
From meso- + -derm.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/mesoderm