Phrase guide

Lewis rat

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 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.

Definition source: English Wiktionary via Wiktextract

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Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

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