brown rat

noun

Definition of brown rat

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

1737

First Known Use of brown rat

1737


Medical Dictionary

brown rat

noun

Medical Definition of brown rat

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


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