guinea pig

noun

Definition of guinea pig

  1. 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. 2 :  a subject of research, experimentation, or testing

Examples of guinea pig in a sentence

  1. He volunteered to act as a guinea pig in the experiment.

1664

First Known Use of guinea pig

1664


GUINEA PIG Defined for English Language Learners

guinea pig

noun

Definition of guinea pig for English Language Learners

  • : a small animal that is often kept as a pet

  • : a person or thing used for testing something


GUINEA PIG Defined for Kids

guinea pig

noun

Definition of guinea pig for Students

  1. :  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

play
noun guin·ea pig \ˈgin-ē-ˌ\

Medical Definition of guinea pig

  1. :  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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