arno arnica montana • arno river · · · Info · Definitions · Characters · · arno · · Text Latin · · Script 4 · · Length 2 · · Syllables Definitions · · · (noun) a river in central Italy rising in the Apennines and flowing through Florence and Pisa to the Ligurian Sea. Synonyms: Arno, Arno River, River Arno. · · Noun Definition 1 Characters · · a latin small letter a U+0061 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072