a shoe for swimming; the paddle-like front is an aid in swimming (especially underwater)

one of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper

Any of various aquatic carnivorous mammals of the families Phocidae and Otariidae, found chiefly in cold regions and having a sleek torpedo-shaped body and limbs that are modified into paddlelike flippers, A device or material that is used to close off or fasten an opening or connection, especially to prevent the escape of a liquid or gas, A sealed instrument; a writ or warrant given under seal, intransitive verb_ To hunt seals, transitive verb_ To prevent (a liquid or gas) from escaping, To close or fasten with a seal, To establish or determine irrevocably

short-legged flightless birds of cold southern especially Antarctic regions having webbed feet and wings modified as flippers, Any species of the family Spheniscid‘ or Aptenodytid‘. (See Spheniscid‘ for technical characters.), Any of various stout, flightless aquatic birds of the family Spheniscidae, of the Southern Hemisphere, having flipperlike wings and webbed feet adapted for swimming and diving, short scalelike feathers, and white underparts with a dark back