prosopium williamsonii prosopium cylindraceum • prosoplasia · · · Info · Definitions · Characters · · prosopium williamsonii · · Text Common · · Latin · · Scripts 22 · · Length 10 · · Syllables Definitions · · · (noun) whitefish of the western United States and Canada. Synonyms: Rocky Mountain whitefish, Prosopium williamsonii. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075 w latin small letter w U+0077