from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. slender, weak, and lightweight
Sorry, no etymologies found.
These basic elements he named endomorphy, mesomorphy and ectomorphy, for they seemed to derive from the three layers of the human embryo, the endoderm, the mesoderm and the ectoderm.
No one is simply an endomorph without having at the same time some mesomorphy and ectomorphy, but we have these components in varying degrees.
According to Sheldon's system a 7-1-1 (seven-one-one) is the most extreme endomorph with minimal mesomorphy and ectomorphy.
His neighbor to the south has an equal measure of mesomorphy and ectomorphy, making him thin and muscular.