ectomorph

Etymology
Derived from from William Herbert Sheldon. Equivalent to.

Noun

 * 1) Someone with a lean, only slightly muscular body
 * : Theoretical body type in which a person has a high metabolism. Such a person can easily maintain a low fat physique, but does not add muscle or body weight easily.
 * : Theoretical body type in which a person has a high metabolism. Such a person can easily maintain a low fat physique, but does not add muscle or body weight easily.

Translations

 * French:
 * Russian: