Origin: Latin suffix -al
Developmental has 3 different meanings across 1 category:
A trainee flight controller.
"The developmental flight controller was assigned to mentor the new recruits in air traffic management."
In plain English: A developmental noun is something that helps you grow and change as you get older.
"The developmental stage she reached at age three surprised everyone with her early speech skills."
Related to development.
"The developmental stages of the butterfly are fascinating to observe under a microscope."
The word developmental is formed by adding the suffix -al to the noun development. This construction indicates something that relates to or concerns the process of developing.