hydrofoil

Noun

• a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds
  • the museum houses a replica of the jet hydroplane that broke the record
    

• a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through
  • the fins of a fish act as hydrofoils
    

Related words

• Synonyms: 
  hydroplane , foil