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"
stout-bodied nearly tailless domesticated cavy; often kept as a pet and widely used in research
A tailless rodent of the family Caviidae and the genus Cavia, with short ears and larger than a hamster; the species Cavia porcellus is often kept as a pet.