Definition as Noun

• a person who is subjected to experimental or other observational procedures; someone who is an object of investigation
• stout-bodied nearly tailless domesticated cavy; often kept as a pet and widely used in research

• subject, case

• Cavia cobaya

• "the subjects for this investigation were selected randomly"; "the cases that we studied were drawn from two different communities"

• Guinea Pig vs subject
• Guinea Pig vs case
• Guinea Pig vs Cavia cobaya