brown rat

noun

1. Norway rat.

brown rat

noun

1. a common brownish rat, Rattus norvegicus : a serious pest in all parts of the world Also calledNorway rat

Word History and Origins

Origin of brown rat¹

First recorded in 1820–30

Example Sentences

Although most historical accounts date the arrival of brown rats to about 1775, new evidence suggests this ratty rivalry began much earlier.

From Science Magazine

Today, both types of rats exist in North American cities, though brown rats are more prevalent.

From Seattle Times

The past decade has seen a boom in descriptions of unexpected pollinators, including lizards, opossums, brown rats and cockroaches.

From Scientific American

New York City’s common brown rats share the same traits, but their shorter lifespan makes them unlikely candidates for such trainings, Szott said.

From Seattle Times

But has the city’s vilest enemy, better known as the common brown rat, finally met its match?

From Washington Times