ateliosis

noun

ate·​li·​o·​sis

variants or chiefly British ateleiosis

ə-ˌtel-ē-ˈō-səs  -ˌtē-lē- 

plural atelioses -ˌsēz 

: incomplete development

especially : dwarfism associated with anterior pituitary deficiencies and marked by normal proportions