Arikara Ariidae • aril · · · Info · Definitions · Characters · · Arikara · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a member of the Caddo people who formerly lived in the Dakotas west of the Missouri river. Synonyms: Aricara. · · Noun Definition 1 (noun) the Caddoan language spoken by the Arikara. Synonyms: Aricara. · · Noun Definition 2 Characters · · A latin capital letter a U+0041 a latin small letter a U+0061 i latin small letter i U+0069 k latin small letter k U+006B r latin small letter r U+0072