/huy"dreuh playn'/ , n. , v. , hydroplaned, hydroplaning .
n.
1. a seaplane.
2. an attachment to an airplane enabling it to glide on the water.
3. a light, high-powered boat, esp. one with hydrofoils or a stepped bottom, designed to plane along the surface of the water at very high speeds.
4. a horizontal rudder for submerging or elevating a submarine.
v.i.
5. to skim over water in the manner of a hydroplane.
6. to travel in a hydroplane.
7. Also, aquaplane . (of a vehicular tire or vehicle) to ride on a film of water on a wet surface with a resulting decrease in braking and steering effectiveness.
[ 1900-05; HYDRO- 1 + PLANE 1 ]