hydrofoil - definition and synonyms

noun [countable] 

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/ˈhaɪdrəʊˌfɔɪl/
singularhydrofoil
pluralhydrofoils
  1. a boat with wing-shaped pieces fixed to the bottom that lift the boat onto the surface of the water as it starts to travel quickly
    1. a.
      one of the wing-shaped pieces fixed to the bottom of a hydrofoil