Webster’s Revised Unabridged Dictionary · 1913
Cotillon
Co′til′lon′ (kō′tē′yôN′ or kō′tēl′-; 277), Co·til′lion (kō·tĭl′yŭn), n. [F. cotillon, fr. OF. cote coat, LL. cotta tunic. See Coat.] 1. A brisk dance, performed by eight persons; a quadrille.
2. A tune which regulates the dance.
3. A kind of woolen material for women's skirts.