ectomorph
noun /ˈektəʊmɔːf/
/ˈektəʊmɔːrf/
(biology- a person whose natural body shape is thin
compare endomorph, mesomorphTopics Appearancec2瘦型体质者;外胚层体型者 词源1940s: ecto- from ectodermal (being the layer of the embryo giving rise to physical characteristics which predominate) + -morph.