guinea pig

guinea-pig的词性：
n.（名词）

1. Any of various small, short-eared domesticated rodents of the genus Cavia, having variously colored hair and no visible tail. They are widely kept as pets and often used as experimental animals.
豚鼠，天竺鼠：一种体小、短耳的豚鼠 属家禽啮齿类动物，毛杂色、尾短几不可见。常被作为宠物饲养，亦被用来做实验

2. Informal A person who is used as a subject for experimentation or research.
【非正式用语】 供实验的人：被用来做实验或进行研究的人

guinea-pig的词源：

3. Perhaps alteration influenced by Guinea [used as a name for any faraway unknown country]
可能为 受 Guinea的影响[做为任一遥远且未知的国家的名字]

4. of Guiana
Guiana的变化