# metazoan

> English word · Noun

## Definitions
1. Any animal that is multicellular.
2. Any animal that undergoes development from an embryo stage with two or three tissue layers, namely the ectoderm, endoderm, and sometimes mesoderm.

## Etymology
From translingual Metazoa + -an.

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