Definition of brown rat
: a common domestic rat (Rattus norvegicus) that has been introduced worldwide — called also
Norway rat
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Black rats weigh in at 41/2 ounces and grow up to 5 to 6 inches long; adult brown rats weigh 9 to 10 ounces and reach up to 16 inches.
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In our study, the commonest wild animal detected in New York City waters was the brown rat, a common urban denizen.
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First Known Use of brown rat
1737
Medical Dictionary
brown rat
medical Definition of brown rat
: a common domestic rat of the genus Rattus (R. norvegicus) that has been introduced worldwide — called also
Norway rat
Learn More about brown rat
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See words that rhyme with brown rat Britannica.com: Encyclopedia article about brown rat
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