guinea pig

noun

: a small animal that is often kept as a pet

: a person or thing used for testing something

Full Definition of GUINEA PIG

: 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

: a subject of research, experimentation, or testing

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First Known Use of GUINEA PIG

1664

Rhymes with GUINEA PIG

caprifig, hit it big, infra dig, jury-rig, periwig, strangler fig, thimblerig, weeping fig, whirligig, WYSIWYG, Zagazig

GUINEA PIG Defined for Kids

guinea pig

noun

Definition of GUINEA PIG for Kids

: 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

noun guin·ea pig \ˈgin-ē-ˌ\

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 cavy