youngster

noun

1. a child.
2. a young person.
3. a young horse or other animal.
4. (in the British navy) a midshipman of less than four years’ standing.
5. (in the U.S. Naval Academy) a midshipman in the second year.

noun

1. a young person; child or youth
2. a young animal, esp a horse

n.1580s, from young + -ster. Earlier was youngling, from Old English geongling.