cotillion

cotillion
[kəˈtɪljən]
noun

a dance with elaborate steps and figures, in particular
一种舞步复杂的舞蹈，尤指
■an 18th-century French dance based on the contredanse
（18世纪）法国对舞
■(US)a quadrille
(美)四对舞；卡德里尔（方阵）舞
(US)a formal ball, especially one at which debutantes are presented
(美)（青年女子被介绍进入社交界的）正式舞会

语源

early 18th cent.: from French cotillon, literally 'petticoat dance', diminutive of cotte, from Old French cote