preadult
priˈædʌlt
Definitions
1. noun
A person who is not yet an adult, but is past the juvenile or childhood stage.
“The preadult stage is a critical period of development in many species, including humans.”
2. adjective
Related to or characteristic of a person who is not yet an adult.
“The preadult behavior of some animals is often a result of their environment and upbringing.”