%flippers%

n. flipper [ By analogy with flipper[ W13(1) ], the limb of an aquatic animal used for locomotion ] A type of shoe with a paddle-like front extending well beyond the end of the toe, used an aid in swimming (especially underwater). They are typically of rubber-like material, and are not worn when walking on land.
Syn. -- fin, fins. [ WordNet 1.5 ]