hydrofoil


Concise Oxford English Dictionary © 2008 Oxford University Press:
hydrofoil/ˈhʌɪdrəfɔɪl/
noun a boat 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-, on the pattern of aerofoil.
'hydrofoil' also found in these Oxford entries:

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