Dictionary

hydrofoil

noun hy·dro·foil \ˈhī-drə-ˌfi(-ə)l\

: a very fast boat that rises partly out of the water when moving at high speeds

Full Definition of HYDROFOIL

1
:  a body similar to an airfoil but designed for action in or on water
2
:  a motorboat that has metal plates or fins attached by struts fore and aft for lifting the hull clear of the water as speed is attained
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Illustration of HYDROFOIL

First Known Use of HYDROFOIL

1919

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