Also called lab·o·ra·to·ry rat [lab-ruh-tawr-ee rat, lab-er-uh-] /ˈlæb rəˌtɔr i ˌræt, ˈlæb ər ə-/. a rat, typically the Norway rat, used by scientists for biological research.
Informal. a laboratory researcher, often a graduate student, whose dedication to the research supplants other interests and activities, including personal relationships: The loneliest guy in the room is the one who’s in love with a lab rat.
Informal. the subject of any sort of experiment: Not all the human lab rats in this study fully understood the potential consequences.
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You may be good at Sudoku, but do you know what the word literally means?
Are you passionate about Sudoku? The number puzzle is so popular that its origin and the meaning of its name deserve some attention. (Don’t confuse the word “sudoku” with “sodoku,” which is a bacterial zoonotic disease known as “rat-bite fever.” Basically, sodoku has more in common with the Ebola virus than any puzzle game.) Sudoku is similar to types of European puzzles that were played in …
Origin of lab rat
First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019