Topic summary
Tween

Extracted from the Wikipedia article Preadolescence.
Terminology
A term used to refer to the preadolescent stage in everyday speech is tween and its perhaps older variants tweenie, tweeny, tweenager, preteen and tweener. It is a blend (portmanteau) of the words "teen" and "between" in the sense of "between childhood and adolescence" and refers to 9- to 12-year-olds. Sometimes the terms tweenie and tweenager are used to differentiate between older (10 to 15) and younger (7 to 11) age groups, respectively.