hydrofoil

noun

1. a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through

- the fins of a fish act as hydrofoils

Similar word(s): foil

Definition categories: man–made, device

2. a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds

- the museum houses a replica of the jet hydroplane that broke the record

Similar word(s): hydroplane

Definition categories: man–made, speedboat