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
In the meantime, the initial cohort of scientists see themselves as guinea pigs in NSF’s grand new experiment.
—
science.org, 2 July 2024
Stop quivering like a bunch of nervous guinea pigs and get out of our way.
—Matt Bai, Washington Post, 2 July 2024
The pet food pantry supplies goods for about 900 pets per month, including dogs, cats, chickens, guinea pigs, goats, birds, fish, rabbits, horses and more, Bowden and Szper said.
—Lizzy Alspach, Baltimore Sun, 28 June 2024
On Thursday, his caseload included doing acupuncture on five cats, a Clumber spaniel named Aspen and a guinea pig named Pony; vaccinating a 14-year-old Bichon Frisé named Cabo San Lucas and doing a checkup on a 30-pound, 12-week-old Bernese mountain dog.
—Mary Divine, Twin Cities, 27 June 2024
See all Example Sentences for guinea pig 
science.org, 2 July 2024
Stop quivering like a bunch of nervous guinea pigs and get out of our way.
—Matt Bai, Washington Post, 2 July 2024
The pet food pantry supplies goods for about 900 pets per month, including dogs, cats, chickens, guinea pigs, goats, birds, fish, rabbits, horses and more, Bowden and Szper said.
—Lizzy Alspach, Baltimore Sun, 28 June 2024
On Thursday, his caseload included doing acupuncture on five cats, a Clumber spaniel named Aspen and a guinea pig named Pony; vaccinating a 14-year-old Bichon Frisé named Cabo San Lucas and doing a checkup on a 30-pound, 12-week-old Bernese mountain dog.
—Mary Divine, Twin Cities, 27 June 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 7 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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