Quad-

Quadrille

• (qua-drille) n.
  • 1. A square dance of French origin composed of five sections and performed by four couples.
  • 2. A card game popular during the 18th century, played by 4 people with a deck of 40 cards.
  • 3. Fr. Marked with squares, generall by thin lines crossing at right angles and at equal intervals; as graphing or plotting paper.

[French from quadrille: team, crew, one of four groups of horsemen. From Spanish cuadrilla, probably dimunitive of cuadro (square) from Latin quadrum]

source: Dictionary.com