hydrofoil

 
Pronunciation: /ˈhʌɪdrə(ʊ)fɔɪl/

noun

  • a boat whose hull is fitted underneath with shaped vanes (foils) which lift the hull clear of the water at speed.
  • each of the foils of a hydrofoil.

Origin:

1920s: from hydro- 'relating to water', on the pattern of aerofoil