'Quadruplet' definitions:

Definition of 'quadruplet'

(from WordNet)
noun
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]
noun
One of four children born at the same time from the same pregnancy [syn: quadruplet, quad]
noun
A set of four similar things considered as a unit [syn: quartet, quartette, quadruplet, quadruple]

Definition of 'Quadruplet'

From: GCIDE
  • 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.]