unio Unio • uniocular · · · Info · Definitions · Characters · · unio · · Text Latin · · Script 4 · · Length Definitions · · · (noun) type genus of the family Unionidae. Synonyms: Unio, genus Unio. · · Noun Definition 1 Characters · · i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F u latin small letter u U+0075