| ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adjective
Etymology: under (I) + developed, past participle of develop
1. : not normally or adequately developed
underdeveloped muscles
underdeveloped sense of responsibility
underdeveloped chin
2. : insufficiently developed to give a satisfactory photographic image
underdeveloped negative
3. : failing to realize a potential economic level of industrial production and standard of living because of lack of capital for exploitation of natural resources, shortage of technically trained personnel, low medical standards, or because of culture traits resistant to change
a program of technical assistance for underdeveloped areas