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Meaning of ectomorphic

ec•to•mor•phic

Pronunciation: (ek"tu-môr'fik), [key]
— adj.
  1. having a thin body build, roughly characterized by the relative prominence of structures developed from the embryonic ectoderm (contrasted with endomorphic, mesomorphic).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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