quadruplet

from WordNet (r) 3.0 (2006)

quadruplet
    n 1: the cardinal number that is the sum of three and one [syn:
         {four}, {4}, {IV}, {tetrad}, {quatern}, {quaternion},
         {quaternary}, {quaternity}, {quartet}, {quadruplet},
         {foursome}, {Little Joe}]
    2: one of four children born at the same time from the same
       pregnancy [syn: {quadruplet}, {quad}]
    3: a set of four similar things considered as a unit [syn:
       {quartet}, {quartette}, {quadruplet}, {quadruple}]

from The Collaborative International Dictionary of English v.0.48

Quadruplet \Quad"ru*plet\, n. [From {Quadruple}.]
   1. A collection or combination of four of a kind.
      [Webster 1913 Suppl.]

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

   3. A cycle for carrying four riders, so arranged that all the
      riders can assist in the propulsion.
      [Webster 1913 Suppl.]

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