Any life-long disability attributable to mental and/or physical impairments, manifested during childhood or later in the human development age (variously given as being before age 16, 18, or 21).

A type of psychologist who focuses on systematic psychological changes, emotional changes, and perceptual changes that occur in human beings over the course of their life span

One who studies developmental biology.

plural of developmental psychologist

plural of developmental position

plural of developmental biologist

(psychiatry) Any of a group of five disorders characterized by delays in the development of multiple basic functions including socialization and communication. They are: Asperger syndrome, autism, childhood disintegrative disorder, Rett syndrome, and PDD-NOS.

plural of pervasive developmental disorder

(biology) A branch of biology that studies the interaction of evolutionary and developmental processes.

A follower or proponent of developmentalism.