- amphibious, amphibian - relating to or characteristic of animals of the class Amphibia
- amphibian, amphibious vehicle - a flat-bottomed motor vehicle that can travel on land or water
--1 is a kind of motor vehicle, automotive vehicle
--1 has particulars: swamp buggy, marsh buggy - amphibian, amphibious aircraft - an airplane designed to take off and land on water
--2 is a kind of airplane, aeroplane, plane
--2 has parts: pontoon - amphibian - cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form
--3 is a kind of vertebrate, craniate
--3 is a member of Amphibia, class Amphibia
--3 has parts: lateral line, lateral line organ
--3 has particulars:Hynerpeton bassetti; Ichyostega; urodele, caudate; salamander; frog, toad, toad frog, anuran, batrachian, salientian; caecilian, blindworm; labyrinthodont