noun Date: 1664 a small stout-bodied short-eared tailless domesticated rodent ( Cavia porcellus ) of South American origin often kept as a pet and widely used in biological research, a subject of research, experimentation, or testing
GUINEA PIG
Meaning of GUINEA PIG in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012