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Meaning of Norway rat

Nor'way rat'

Pronunciation: [key]
  1. an Old World rat, Rattus norvegicus, having a grayish-brown body with whitish underparts and a long, scaly tail, now common in the U.S. in or near homes, barns, wharves, etc. See illus. underAlso called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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