amphibian
/æmˈfɪbɪən; æm`fɪbɪən/ n
1 animal able to live both on land and in water 两栖动物
Frogs and newts are amphibians. 青蛙和蝾螈都是两栖动物.
2 aircraft that can take off from or alight on either land or water 水陆两用飞行器.
3 vehicle that can move over land or water 水陆两用车.