ectomorph.
Someone with a lean, only slightly muscular body
Meaning & usage
Someone with a lean, only slightly muscular body
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.
Where this word comes from
Derived from ectoderm + -morph from William Herbert Sheldon. Equivalent to ecto- + -morph.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.