[qua.drille] n [F, group of knights engaged in a carousel, fr. Sp cuadrilla troop, fr. dim. of cuadra square, fr. L quadra, quadrum] (1726) 1: a four-handed variant of ombre popular esp. in the 18th century
2: a square dance for four couples made up of five or six figures chiefly in 6/8 and 2/4 time; also: music for this dance
[2]quadrille adj [F quadrille] (ca. 1885): marked with squares or rectangles