1
- Zoology a cold-blooded vertebrate animal of a class that comprises the frogs, toads, newts, salamanders, and caecilians. They are distinguished by having an aquatic gill-breathing larval stage followed (typically) by a terrestrial lung-breathing adult stage.【动】两栖纲动物。
1.1
- Class Amphibia: orders Urodela (newts and salamanders), Anura (frogs and toads), and Gymnophiona (caecilians).两栖纲：有尾目（水螈和蝾螈）, 无尾目（青蛙和蟾蜍）, 裸蛇目（蚓螈）。
1.2
- a seaplane, tank, or other vehicle that can operate on land and on water水陆两用飞机; 水陆两用坦克; 水陆两用交通工具。
- Zoology of or relating to this class of animals【动】（与）两栖纲动物（有关）的：
amphibian eggs.
两栖纲动物的卵。
词源
mid 17th cent. （in the sense 'having two modes of existence or of doubtful nature'）： from modern Latin amphibium 'an amphibian'， from Greek amphibion （noun use of amphibios 'living both in water and on land'， from amphi 'both' + bios 'life'）.