American Heritage Dictionary
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After examining over 4,000 people he came up with a classification that divided the human race into three broad categories: the endomorph or rolypoly, the mesomorph or bone and muscle, and the ectomorph or string-bean type.— Modern Mechanix
As we all know there are 3 body types: mesomorphs, ectomorph and endomorph.— Find Free Articles - ArticlesBase
Scientists have developed a body type classification system based totally on some factors and everyone falls into one of the following 3 classes (you can fall in-between, as these are quite generalized): endomorph, mesomorph and ectomorph.— MyLinkVault Newest Links
The following category we shall look at is the ectomorph body type.— MyLinkVault Newest Links
Besides, he says, with some resignation, Rambo's "Prob'ly like a real ectomorph ... really lean and-and strong."— Village Voice - The most recent 10 stories

American Heritage Dictionary (1)
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