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n. 1. See seaplane. 2. A motorboat designed so that the prow and much of the hull lift out of the water and skim the surface at high speeds. 3. See hydrofoil. 4. A horizontal rudder on a submarine. intr.v. hy·dro·planed, hy·dro·plan·ing, hy·dro·planes 1. To drive or ride in a hydroplane. 2. a. To skim along on the surface of the water. b. To be or go out of control by skimming along the surface of a wet road. Used of a motor vehicle.  (click for a larger image) hydroplane |
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