a shoe for swimming; the paddle-like front is an aid in swimming (especially underwater)
the flat broad limb of aquatic animals specialized for swimming
- Seals, turtles and penguins have flippers.
海豹、 海龟、 企鹅均有鳍状肢。
- It's almost like a flipper action as she kicks down.
- As a couple of flipper kicks took me ever deeper, a lionfish emerged from behind a rusted axle.