Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun quadruplet

3 senses of quadruplet

Sense 1
four, 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe -- (the cardinal number that is the sum of three and one)
       => digit, figure -- (one of the elements that collectively form a system of numeration; "0 and 1 are digits")

Sense 2
quadruplet, quad -- (one of four children born at the same time from the same pregnancy)
       => sibling, sib -- (a person's brother or sister)

Sense 3
quartet, quartette, quadruplet, quadruple -- (a set of four similar things considered as a unit)
       => set -- (a group of things of the same kind that belong together and are so used; "a set of books"; "a set of golf clubs"; "a set of teeth")