guinea-pig /'gini pig; 'gini pig/ n short-eared animal like a big rat, often used in scientific experiments; sb allowing himself to be used in medical or other experiments. 天竺鼠; 豚鼠 (常供科學(xué)實驗用); 供醫(yī)學(xué)或其他實驗的人?！?the illus at small. 參看 small 之插圖。