rattus

• ratus

Borrowed from a Germanic language, ultimately from Proto-Germanic *rattaz (“rat”).

rattus m (variously declined, genitive rattī or rattūs); second declension, fourth declension

1. (Medieval Latin) rat

In Classical Latin, the word mūs was applied to both mice and rats without distinction.

Declined as either a second or fourth declension noun.

• Translingual: Rattus, Rattus rattus

• rattus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  ratus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  [note: du Cange has only second declension forms and no fourth declension form]