black rat

noun

Medical Definition of black rat

: a rat of the genus Rattus (R. rattus) that infests houses and has been the chief vector of bubonic plague

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Dictionary Entries Near black rat

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Cite this Entry

“Black rat.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/black%20rat. Accessed 28 Nov. 2021.

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