quadruplet
Definitions
One of four children or offspring born at a single birth.
A group or set of four things or people.
A musical note or group of notes divided into four equal parts in the time of three.
Examples
The local hospital celebrated the rare birth of a healthy set of quadruplets.
She was surprised to learn that her grandmother was one of a quadruplet set born in the 1940s.
Raising a quadruplet requires a significant amount of patience, organization, and resources.