# ectoderm

> English word · Noun · frequency rank #98,055

## Definitions
1. The outermost of the three tissue layers in the embryo of a metazoan animal, which produces through development, the epidermis (skin) and nervous system of the adult.

## Etymology
From ecto- + -derm.

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