ad·o·les·cent
Pronunciation: 'ad-o-les-ent
Date: 15th century, first recorded in English in a work written perhaps in 1440
Function: adjective
1 : Of, relating to, or undergoing adolescence. See Synonyms at young.
2 : Characteristic of adolescence; immature:
Function: noun
1 : A young person who has undergone puberty but who has not reached full maturity; a teenager.