Flippers

noun

1. In marine mammals such as whales, a wide flat limb, adapted for swimming.
2. A flat, wide, paddle-like rubber covering for the foot, used in swimming.
3. A flat lever in a pinball machine, triggered by the player to strike the ball and keep it in play.
4. A small flat used to support a larger one.
5. A type of ball bowled by a leg spin bowler, which spins backwards and skids off the pitch with a low bounce.