femme fatale
nounNAmE//ˌfɛm fəˈtæl//, NAmE//ˌfɛm fəˈtɑl//
(pl. femmes fatales NAmE//ˌfɛm fəˈtælz//, NAmE//ˌfɛm fəˈtɑlz//, NAmE//ˌfɛm fəˈtæl//, NAmE//ˌfɛm fəˈtɑl//
) (from French)Check pronunciation: femme fatale
Definition of femme fatale noun from the Oxford Advanced American Dictionary