a broad, flat limb, as of a seal or whale, especially adapted for swimming . Also called fin. one of a pair of paddlelike devices, usually of rubber, worn on the feet as an aid in scuba diving and swimming.
a broad, flat limb, as of a seal or whale, especially adapted for swimming . Also called fin. one of a pair of paddlelike devices, usually of rubber, worn on the feet as an aid in scuba diving and swimming.