underdevelopment; incomplete development
General term for something not having developed fully, used for physical, mental, or systemic growth.
Industry in this region is in an underdeveloped state.
aplasia; hypoplasia; dysgenesis; infantilism
Medical term for incomplete or absent development of an organ, tissue, or body part.
Due to congenital hypoplasia, the kidney may not function adequately.
未発達 also means underdevelopment but is more commonly used for skills, systems, or regions, while 発育不全 often implies a biological or medical context.
Compound of 発育 (development, growth) and 不全 (insufficiency, incomplete). The term is a straightforward Sino-Japanese medical and general expression.