Lewis rat

noun

A kind of albino rat used in medical research, exhibiting docile behavior and low fertility, and suffering from high incidences of neoplasms and other pathology.

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Meanings

nounLewis rat (plural Lewis rats)

plural Lewis rats

  1. A kind of albino rat used in medical research, exhibiting docile behavior and low fertility, and suffering from high incidences of neoplasms and other pathology.

Origin

Bred by Margaret Lewis from Wistar stock in the early 1950s.

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Cite this entry
APA

Lewis rat. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Lewis%20rat

MLA

“Lewis rat.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Lewis%20rat. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Lewis rat,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Lewis%20rat.

Source: Lewis rat on Wiktionary, CC BY-SA 4.0.