What is the medical term for overdevelopment?

The medical term for overdevelopment is hypertrophy. Hypertrophy is defined as an increase in size of a tissue or organ due to an increase in the size of its cells. Hypertrophy can be physiological, which is a normal response to increased demand, or pathological, which is an abnormal increase in size that can be caused by a number of factors, such as disease or injury.