Guinea Pig (Noun)
Meaning 1
Stout-bodied nearly tailless domesticated cavy; often kept as a pet and widely used in research.
Classification
Nouns denoting animals.
Synonyms
Meaning 2
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".
Classification
Nouns denoting people.