guinea pig
noun
1
: a small stout-bodied short-eared tailless domesticated rodent (Cavia porcellus) of South American origin often kept as a pet and widely used in biological research
called also cavy
2
: a subject of research, experimentation, or testing
Examples of guinea pig in a Sentence
He volunteered to act as a guinea pig in the experiment.
Recent Examples on the Web
Resident Emily Lemp was out working when the fire broke out and was worried about her guinea pig left home alone.
—
Thomas Tracy, New York Daily News, 13 Mar. 2024
Rabbits, guinea pigs, hamsters, and household birds can also accompany passengers in the cabin, but only on flights within the U.S.
Passengers traveling with a pet cannot sit in the emergency exit rows or the first row of the plane.
—Sarah Kuta, Condé Nast Traveler, 3 Jan. 2023
Besides dogs and cats, animals allowed inside are birds, ferrets, gerbils, guinea pigs, hamsters, mice, rats and rabbits under 10 pounds.
—Devoun Cetoute, Miami Herald, 31 May 2024
Man with Terminal Illness Wants to Find His Dog Best Friend a New Home Before His Death
Guinea pigs Drew and Luke, both 9-month-old males, are also up for adoption and are both looking for homes with another guinea pig companion.
—Charlotte Phillipp, Peoplemag, 20 May 2024
See all Example Sentences for guinea pig 
Thomas Tracy, New York Daily News, 13 Mar. 2024
Rabbits, guinea pigs, hamsters, and household birds can also accompany passengers in the cabin, but only on flights within the U.S.
Passengers traveling with a pet cannot sit in the emergency exit rows or the first row of the plane.
—Sarah Kuta, Condé Nast Traveler, 3 Jan. 2023
Besides dogs and cats, animals allowed inside are birds, ferrets, gerbils, guinea pigs, hamsters, mice, rats and rabbits under 10 pounds.
—Devoun Cetoute, Miami Herald, 31 May 2024
Man with Terminal Illness Wants to Find His Dog Best Friend a New Home Before His Death
Guinea pigs Drew and Luke, both 9-month-old males, are also up for adoption and are both looking for homes with another guinea pig companion.
—Charlotte Phillipp, Peoplemag, 20 May 2024
See all Example Sentences for guinea pig
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Cite this Entry
“Guinea pig.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/guinea%20pig. Accessed 1 Jul. 2024.
Copy CitationMedical Definition
guinea pig
noun
guin·ea pig
ˈgin-ē-ˌ 
: a small stout-bodied short-eared nearly tailless domesticated rodent of the genus Cavia (C. cobaya) often kept as a pet and widely used in biological research
called also cavy
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