• One of four offspring born in a single birth.
  • A group or combination of four associated by common properties or behavior.
  • A group of four notes having the time value of three notes of the same kind.
  • Any combination of four objects or parts grouped, united, or acting together: as, a <em>quadruplet</em> of springs, consisting of four elliptic springs coupled together and acting as one spring. Also called <internalXref urlencoded="quartet">quartet</internalXref>.
  • One of four born at a single birth.
  • A bicycle for four riders.
  • In <em>music</em>, same as <internalXref urlencoded="quartole">quartole</internalXref>.
  • A collection or combination of four of a kind.
  • Four children born in the same labor.
  • A cycle for carrying four riders, so arranged that all the riders can assist in the propulsion.
  • One of a group of four babies born from the same mother during the same birth.
  • Sequence of four elements.
  • one of four children born at the same time from the same pregnancy
  • a set of four similar things considered as a unit
  • the cardinal number that is the sum of three and one
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