Quince is the Spanish word for fifteen, the number represented by the name quinceañera.
The word connects the celebration directly to the celebrant’s traditional age. In Spanish, quince is the cardinal number 15, while quinceañera is the feminine noun associated with a girl celebrating that birthday and with the celebration itself.
This vocabulary helps explain why the event is sometimes shortened to “a quince” in English-speaking communities. That informal form refers to the party or milestone rather than changing the underlying Spanish meaning.
Quince should not be confused with catorce, which means fourteen, or dieciséis, which means sixteen. The name identifies the fifteenth birthday, although families may hold the party before or after the exact birthday for scheduling reasons.