guinea pig
Definition of guinea pig
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
From the M-W Editors
Examples of guinea pig in a Sentence
He volunteered to act as a guinea pig in the experiment.
First Known Use of guinea pig
1664
GUINEA PIG Defined for English Language Learners
guinea pig
Definition of guinea pig for English Language Learners
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: a small animal that is often kept as a pet
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: a person or thing used for testing something
GUINEA PIG Defined for Kids
guinea pig
Definition of guinea pig for Students
: a small stocky South American animal that is a rodent with short ears and a very short tail and is often kept as a pet
Medical Dictionary
guinea pig
playMedical Definition of guinea pig
: 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
Learn More about guinea pig
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See words that rhyme with guinea pig Spanish Central: Translation of guinea pig Nglish: Translation of guinea pig for Spanish speakers Britannica.com: Encyclopedia article about guinea pig
Seen and Heard
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