rattus rattus rattus norvegicus • ratty · · · Info · Definitions · Synonyms · Characters · · rattus rattus · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) common household pest originally from Asia that has spread worldwide. Synonyms: black rat, roof rat, Rattus rattus. · · Noun Definition 1 Synonyms · · · black rat · · Synonym 1 roof rat · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075