ectomorph

noun
🔊/ˈektəʊmɔːf/
🔊/ˈektəʊmɔːrf/
(biology生物)
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  1. a person whose natural body shape is thin瘦型体质者;外胚层体型者 compare endomorph, mesomorphTopics Appearancec2
    Word Origin1940s: ecto- from ectodermal (being the layer of the embryo giving rise to physical characteristics which predominate) + -morph.