amphibious vehicle

vehicle which is adapted for both land and water

An amphibious vehicle (or simply amphibian), is a vehicle or craft, that is a means of transport, viable on land as well as on water - just like an amphibian.This definition applies equally to any land and water transport, small or large, powered or unpowered, ranging from amphibious bicycles, ATVs, cars, buses, trucks, RVs, and military vehicles, all the way to the very largest hovercrafts. Classic landing craft are generally not considered amphibious vehicles, although they are part of amphibious assault. Nor are Ground effect vehicles, such as Ekranoplans. The former don't offer any real land transportation at all - the latter (aside from completely disconnecting from the surface, like an airplane), will likely crash on any but the flattest of landmasses.
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Noun
1. a flat-bottomed motor vehicle that can travel on land or water
(synonym) amphibian
(hypernym) motor vehicle, automotive vehicle
(hyponym) swamp buggy, marsh buggy

A wheeled or tracked vehicle capable of operating on both land and water. See also landing craft; vehicle. 1/2/73

Véhicule capable d'opérer sur terre et sur l'eau. Est muni de roues ou de chenilles. Voir aussi engin de débarquement; véhicule. 1/2/73

VEICOLO ANFIBIO