n. guinea pig
Definition of guinea pig in English
Herbivorous rodent, between 20 and 30 cm (8-12 in) in length, that has small, round ears, and is often used in biomedical experimentation.
Herbivorous rodent, between 20 and 30 cm (8-12 in) in length, that has small, round ears, and is often used in biomedical experimentation.