Simple Definition of guinea pig
: a small animal that is often kept as a pet
: a person or thing used for testing something
Full 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
Examples of guinea pig in a sentence
He volunteered to act as a guinea pig in the experiment.
First Known Use of guinea pig
GUINEA PIG Defined for Kids
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 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
Seen and Heard
What made you want to look up guinea pig? Please tell us where you read or heard it (including the quote, if possible).