1. A dance having five figures, in common time, four couples of dancers being in each set.
2. The appropriate music for a quadrille.
QUADRILLE Qua*drille", n. Etym: [F. quadrille, n. masc., cf. It. quadriglio; or perhaps from the Spanish. See Quadrille a dance.]
Defn: A game played by four persons with forty cards, being the remainder of an ordinary pack after the tens, nines, and eights are discarded. Hoyle.
QUADRILLION Quad*ril"lion, n. Etym: [F., fr. L. quater four times, akin to quattuor four, E. four; — formed like million. See Four, Million.]
Defn: According to the French notation, which is followed also upon the Continent and in the United States, a unit with fifteen ciphers annexed; according to the English notation, the number produced by involving a million to the fourth power, or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration.
QUADRILOBATE; QUADRILOBED Quad`ri*lo"bate, Quad`ri*lobed, a. Etym: [Quadri- + lobe: cf. F. quadrilobé.]
Defn: Having four lobes; as, a quadrilobate leaf.
QUADRILOCULAR Quad`ri*loc"u*lar, a. Etym: [Quadri- + locular: cf. F. quadriloculaire.]
Defn: Having four cells, or cavities; as, a quadrilocular heart.