# ectomorph

> English word · Noun · IPA /ˈɛktəʊmɔːf/

## Definitions
1. Someone with a lean, only slightly muscular body
2. Theoretical body type in which a person has a high metabolism. Such a person can easily maintain a low fat physique, but does not add muscle or body weight easily.

## Etymology
Derived from ectoderm + -morph from William Herbert Sheldon. Equivalent to ecto- + -morph.

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