1 : of or relating to the growth or development of someone or something
▪ A drop in temperature can slow the plant's developmental process. ▪ developmental biology/psychology ▪ a child with developmental abnormalities/defects/disabilities/problems ▪ My theory is still in its developmental stage. 2 : designed to help a child grow or learn
▪ developmental toys
▪ A drop in temperature can slow the plant's developmental process. ▪ developmental biology/psychology ▪ a child with developmental abnormalities/defects/disabilities/problems ▪ My theory is still in its developmental stage.
▪ developmental toys
— de·vel·op·men·tal·ly adverb
▪ a developmentally disabled child [=a child who is not able to develop in the normal way because of a physical or mental problem]
▪ a developmentally disabled child [=a child who is not able to develop in the normal way because of a physical or mental problem]





