underdevelopment; poor growth; failure to thrive
Medical and general term for inadequate physical or developmental growth. Often used in pediatric contexts (failure to thrive) or for plants/crops.
This child was diagnosed with failure to thrive.
Poor growth is observed in the crops due to lack of sunlight.
発達障害 refers to developmental disorders (e.g., autism, ADHD), while 発育不良 is about physical growth or overall thriving, not necessarily a disorder.
成長不良 is a near synonym also meaning poor growth, but 発育不良 is more common in medical contexts, especially for children.
Compound of 発育 (development, growth) and 不良 (poor, bad). The components are standard Sino-Japanese words.