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WordNet
amphibious vehicle

n. a flat-bottomed motor vehicle that can travel on land or water [syn: amphibian]

Wikipedia
Amphibious vehicle

An amphibious vehicle (or simply amphibian), is a vehicle that is a means of transport, viable on land as well as on (or under) water. Amphibious vehicles include amphibious bicycles, ATVs, cars, buses, trucks, military vehicles, and hovercraft.

Classic landing craft are not amphibious vehicles as they do not offer any real land transportation at all, although they are part of amphibious assault. Ground effect vehicles, such as Ekranoplans, will likely crash on any but the flattest of landmasses so are also not considered to be amphibious vehicles.

Usage examples of "amphibious vehicle".

The amphibious vehicle might possibly be visible - since it was no longer supposed to exist - so he had plotted a course and they would move only when the satellite was at another point around Botany's globe.

The BMP-3, then the most advanced APC in the Russian armoury, was a heavily armed tracked amphibious vehicle, capable of carrying seven infantry and its three-man crew.

She thought it was a boat at first, but as it grew quickly in size Nina made out a squat ugly black hull she recognized as that of a large hovercraft, an amphibious vehicle that moves across land and sea on a cushion of air.

The ship splashed down beside a floating waystation, and they were transferred to a tanklike amphibious vehicle.

Grouped around the ruined hull of an enemy armored amphibious vehicle were the men of the First Platoon, Alpha Company, Fifth Battalion, Seventh Cavalry.