名词

1. 脚蹼;橡皮脚掌;鸭脚板
Flippers are flat pieces of rubber that you can wear on your feet to help you swim more quickly, especially underwater.

2. (海豹等的)鳍状肢，鳍足
The flippers of an animal that lives in water, for example a seal or a penguin, are the two or four flat limbs which it uses for swimming.

1. the flat broad limb of aquatic animals specialized for swimming

2. a shoe for swimming
the paddle-like front is an aid in swimming (especially underwater)

Synonym: fin