Found 2 items, similar to guinea pig.
English → English (WordNet) Definition: guinea pig guinea pig n 1: a person who is subjected to experimental or other observational procedures; someone who is an object of investigation; “the subjects for this investigation were selected randomly”; “the cases that we studied were drawn from two different communities” [syn: subject, case] 2: stout-bodied nearly tailless domesticated cavy; often kept as a pet and widely used in research [syn: Cavia cobaya]
English → English (gcide) Definition: Guinea pig Guinea pig \Guin"ea pig`\ [Prob. a mistake for Guiana pig.] 1. (Zo["o]l.) A small Brazilian rodent (Cavia porcellus or Cavia cobaya), about seven inches in length and usually of a white color, with spots of orange and black. Called also cavy. It is the domesticated form of the wild cavy, often kept as a pet and used commonly as an experimental animal in laboratory research. [Webster 1913 Suppl. +PJC] 2. Hence, [figuratively]: Any animal or person used in an experiment; -- also applied to people who are unwillingly or unknowingly subjected by authorities to policies or procedures which might cause bodily or mental harm. [PJC] 3. A contemptuous sobriquet. [Obs.] --Smollett [Webster 1913 Suppl. +PJC]