Meaning of HYDROFOIL in English

HYDROFOIL

I. ˈ ̷ ̷ ̷ ̷+ˌ- noun

Etymology: hydr- + foil

1. : a flat or curved plane surface designed to obtain reaction upon its surfaces from the water through which it moves

ships of all sizes may be effectively stabilized against rolling … by the use of controlled hydrofoils — F.D.Braddon

— compare airfoil , hydroplane

2. : an underwater plate or fin attached by struts to a seaplane (where it is retractable) or to a speedboat for lifting the hull clear of the water as speed is increased

[s]hydrofoi.jpg[/s] [

hydrofoil 2

]

II. noun

: a boat equipped with hydrofoils

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.