- youth (young person)
- A person 13 to 18 years of age.
Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
- 1: Physiologically immature or undeveloped <juvenile fish>.
2: Of, relating to, characteristic of, or affecting children or young people <juvenile arthritis>.
3: Reflecting psychological or intellectual immaturity <juvenile behavior>.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
See also Understanding Medical Terminology.