brown rat


brown rat

noun

Definition of BROWN RAT

:  a common domestic rat (Rattus norvegicus) that has been introduced worldwide —called also Norway rat

First Known Use of BROWN RAT

1781

brown rat

noun    (Medical Dictionary)

Medical Definition of BROWN RAT

: a common domestic rat of the genus Rattus (R. norvegicus) that has been introduced worldwide—called also Norway rat

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