Wiktionary
preteenager
n. A person of somewhat less than 13 years of age
WordNet
preteenager
n. a preadolescent boy or girl (usually between 9 and 12 years of age); "little league is intended for the preteens" [syn: preteen]
Usage examples of "preteenager".
He reached instead for a book on mental disorders in preteenagers from a shelf behind his desk.
Several preteenagers rushed past him laughing loudly, tossing popcorn at each other.