Merriam-Webster Collegiate Dictionary - cajun

 I. noun  also Cajan  Etymology: alteration of Acadian  Date: 1868 a Louisianian descended from French-speaking immigrants from Acadia  II. adjective  Date: 1880  1. of, relating to, or characteristic of the ~s  2. of, relating to, or prepared in a style of cooking originating among the ~s and characterized by the use of hot seasonings (as cayenne pepper)