flipper
noun/ˈflɪpə(r)/
/ˈflɪpər/
[usually plural]- a flat body part like an arm without fingers that some sea animals such as seals and turtles use for swimmingTopics Animalsc2
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- a long flat piece of rubber or plastic that you wear on your foot to help you swim more quickly, especially below the surface of the water
- a pair of flippers
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flipper