American Heritage Dictionary
(2)
Century Dictionary
(1)
GNU Webster's 1913
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WordNet
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Elsewhere on the web
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
This is fundamental - like conservative or liberal, Yankee or Met, introvert or extrovert, ecto -, meso -, or endomorph.— National Review Online
As we all know there are 3 body types: mesomorphs, ectomorph and endomorph.— Find Free Articles - ArticlesBase
If you are an endomorph and you want to lose fat then you have to work very hard.— Find Free Articles - ArticlesBase
If you are an endomorph then high levels of activity, discipline and some kind of a carbohydrate restriction and high protein diet is necessary.— Find Free Articles - ArticlesBase

American Heritage Dictionary (1)
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