quintuplet

(noun) the cardinal number that is the sum of four and one. Synonyms: five, 5, V, cinque, quint, quintet, fivesome, pentad, fin, Phoebe, Little Phoebe.

(noun) one of five children born at the same time from the same pregnancy. Synonyms: quint, quin.

(noun) a set of five similar things considered as a unit. Synonyms: quintet, quintette, quintuple.