swim fin

American  

noun

1. one of a pair of flippers.

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Etymology

Origin of swim fin

First recorded in 1945–50

Example Sentences

In 2022 the swim fin was on the other foot—and the importance of the technological treasure sitting on the seabed was gargantuan.

From Scientific American

While Ben has his blade, a child from Cumbria has been given a water limb called a "swim fin" which will make swimming with friends possible.

From BBC

For both my sake and the health of the reef, I don’t want to touch its flora or fauna, especially the coral, which is sharp and easily broken by a kick from an errant swim fin.

From Washington Post

He swims with a swim fin on his left stump.

From Washington Times