Guinea Pig Definition & Meaning

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  • Etymology
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    • Synonyms guinea pig American

    noun

    1. a short-eared, tailless rodent of the genus Cavia, usually white, black, and tawny, commonly regarded as the domesticated form of one of the South American wild species of cavy: often used in scientific experiments or kept as a pet.

    2. Informal. the subject of any sort of experiment.

      I've volunteered as a guinea pig in several clinical trials.

    guinea pig British

    noun

    1. a domesticated cavy, probably descended from Cavia porcellus, commonly kept as a pet and used in scientific experiments

    2. a person or thing used for experimentation

    "Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

    Etymology

    Origin of guinea pig

    First recorded in 1655–65

    Related Words

    • experimental subject
    • subject
    • test subject

    Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

    Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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