add. ·noun five children born in the same labor.
2. quintuplet ·add. ·noun a collection or combination of five of a kind.
3. quintuplet ·add. ·noun a group of five connected notes; a turn of five notes.
4. quintuplet ·add. ·noun a cycle having five crank shafts and adapted for five riders, all of whom can assist in the propulsion.