Borrowed from a Germanic language, ultimately from Proto-Germanic *rattaz (“rat”).
rattus m (variously declined, genitive rattī or rattūs); second declension, fourth declension
In Classical Latin, the word mūs was applied to both mice and rats without distinction.
Second-declension noun or fourth-declension noun.
Case | Singular | Plural |
---|---|---|
Nominative | rattus | rattī rattūs |
Genitive | rattī rattūs |
rattōrum rattuum |
Dative | rattō rattuī |
rattīs rattibus |
Accusative | rattum | rattōs rattūs |
Ablative | rattō rattū |
rattīs rattibus |
Vocative | ratte rattus |
rattī rattūs |