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
Source: WordNetguinea-pig
the subjects for this investigation were selected randomly Source: Internet
the cases that we studied were drawn from two different communities Source: Internet
And, if I do try the Kickstarter route, which of my projects should have the honor of being my guinea pig in this new market? Source: Internet
A funny guinea pig cage on a funny table with funny word balloons encased by funny panel borders. Source: Internet
As if chickens, goldfish, and a cat weren't enough, the resident third-grader is now begging for a guinea pig, and is directly to blame. Source: Internet
Abby Redwine has transformed her two bedroom apartment in Casa Grande into a guinea pig rescue. Source: Internet