ectomorphic
adjective
ec·to·mor·phic
ˌek-tə-ˈmȯr-fik 
1
: of or relating to the component in W. H. Sheldon's classification of body types that measures the body's degree of slenderness, angularity, and fragility
2
: characterized by a lean slender body build with slight muscular development
Examples of ectomorphic in a Sentence
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These include the high-altitude environments in which many Kenyans are born and raised, widespread early exposure to running as a means of transportation, and the long-legged, ectomorphic body type that is common among Kenyans.
—
Matt Fitzgerald, Outside Online, 27 July 2015
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Matt Fitzgerald, Outside Online, 27 July 2015
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“Ectomorphic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ectomorphic. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
ectomorphic
adjective
ec·to·mor·phic
ˌek-tə-ˈmȯr-fik
1
: of or relating to the component in W. H. Sheldon's classification of body types that measures the body's degree of slenderness, angularity, and fragility compare endomorphic sense 1, mesomorphic sense 2a
2
: having a light body build compare endomorphic sense 2, mesomorphic sense 2b
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