ectomorphic

ec·to·morph

 (ĕk′tə-môrf′)

n.

An individual having a lean, slightly muscular body build in which tissues derived from the embryonic ectoderm predominate.

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[ecto(derm) + -morph.]

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ec′to·mor′phic adj.

ec′to·mor′phy n.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ec•to•mor•phic

(ˌɛk təˈmɔr fɪk)

adj.

having a thin body build, roughly characterized by the relative prominence of structures developed from the embryonic ectoderm (contrasted with endomorphic, mesomorphic).

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Thesaurus

Adj.

1.

ectomorphic - having a build with little fat or muscle but with long limbs lean, thin - lacking excess flesh; "you can't be too rich or too thin"; "Yon Cassius has a lean and hungry look"-Shakespeare endomorphic, pyknic - having a squat and fleshy build; "a pyknic practical joke" mesomorphic, muscular - having a robust muscular body-build characterized by predominance of structures (bone and muscle and connective tissue) developed from the embryonic mesodermal layer

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