n. 五个一组, 五人一组, 五胞胎之一

[医] 五胎儿

Quintuplet \Quin"tu*plet\, n. [From {Quintuple}.]
1. A collection or combination of five of a kind.
[Webster 1913 Suppl.]

2. pl. Five children born in the same labor.
[Webster 1913 Suppl.]

3. (Mus.) A group of five connected notes; a turn of five
notes.
[Webster 1913 Suppl.]

4. A cycle having five crank shafts and adapted for five
riders, all of whom can assist in the propulsion.
[Webster 1913 Suppl.]