quadruplet
quad-ru-plet
noun
A group or set of four similar things or people.
"The band released a new album with four tracks, a quadruplet."
noun
One of four children born to the same mother at one birth.
"She gave birth to healthy quadruplets."
Thesaurus
Synonyms: IV, tetrad, quaternity, quaternion, 4, four, Little Joe, quatern, quartet, quaternary, foursome, quad