noun
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.
この子は発育不良と診断された。
This child was diagnosed with failure to thrive.
日照不足で作物に発育不良が見られる。
Poor growth is observed in the crops due to lack of sunlight.
Compound of 発育 (development, growth) and 不良 (poor, bad). The components are standard Sino-Japanese words.