Webster's Revised Unabridged Dictionary · 1913

Adolescent

Adolescent (ad`o*les"sent) , adjective

[Latin adolescens, present participle of adolescere to grow up to; ad + the inchoative olescere to grow: compare French adolescent. See Adult.]

Growing; advancing from childhood to maturity.
Schools, unless discipline were doubly strong, Detain their adolescent charge too long. — Cowper

Adolescent , noun

A youth.