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quadruplet

 
Noun quadruplet has 3 senses
  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
    --1 is a kind of digit, figure
  2. quadruplet, quad - one of four children born at the same time from the same pregnancy
    --2 is a kind of sibling, sib
  3. quartet, quartette, quadruplet - a set of four similar things considered as a unit
    --3 is a kind of set
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