Rat·​tus ˈrat-əs How to pronounce Rattus (audio)
: a genus of rodents of the family Muridae that comprise the common rats and are distinguished from members of the closely related genus Mus by bevel-edged upper incisors and comparatively large second and third molars

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“Rattus.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Rattus. Accessed 20 Apr. 2024.

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