amphibious

amphibious
/æmˈfɪbɪəs; æm`fɪbɪəs/ adj
1 living or operating both on land and in water 两栖的; 水陆两用的
    amphibious vehicles 水陆两用车辆.
2 [usu attrib 通常作定语]
involving both sea and land forces 两栖作战的
    amphibious operations 两栖作战.

牛津英汉双解词典