hydrofoil

/ˈhɑe.dɹəˌfoɪl//ˈhaɪ.dɹoʊˌfɔɪl/

noun

  1. 1

    A wing attached to the hull of a ship that raises it out of the water when travelling at speed and thus reduces drag.

  2. 2

    A vessel equipped with such a device.

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