Pronunciation: ˌ ek-t ə - ' mo ̇ r-fik
Function: adjective
Etymology: ecto derm + -morphic; from the predominance in such types of structures developed from the ectoderm
Date: 1940
1 : of or relating to the component in W. H. Sheldon's classification of body types that measures the body's degree of slenderness, angularity, and fragility
2 : characterized by a lean slender body build with slight muscular development