The American Heritage® Dictionary of the English Language, 4th Edition
n. The structure or build of a person, especially to the extent to which it exhibits the characteristics of an ectomorph, an endomorph, or a mesomorph.
n. A type of physique, especially one the types defined by Sheldon: ectomorphic, endomorphic, mesomorphic
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a category of physique
Word Usage
"A Leptosomatic somatotype is characterised by loooooooooooooong legs, arms and body (though not head), leptodactylously loooooooong fingers, feet and toes, slim wrists and, typically, no chest, or a sort of caved in chest."