Black-rat
an Old World rat, Rattus rattus, now common in the southern U.S., having a black or brown body with grayish or white underparts.
Historical Examples
The $100 Prize Essay on the Cultivation of the Potato; and How to Cook the Potato D. H. Compton and Pierre Blot
noun
a common rat, Rattus rattus: a household pest that has spread from its native Asia to all countries
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