[am-fib-ee-uh
n] 
| 1. | any cold-blooded vertebrate of the class Amphibia, comprising frogs and toads, newts and salamanders, and caecilians, the larvae being typically aquatic, breathing by gills, and the adults being typically semiterrestrial, breathing by lungs and through the moist, glandular skin. |
| 2. | an amphibious plant. |
| 3. | an airplane designed for taking off from and landing on both land and water. |
| 4. | Also called amtrac. a flat-bottomed, armed, military vehicle, equipped with both tracks and a rudder, that can travel either on land or in water, used chiefly for landing assault troops. |
[am-fib-ee-uhs] | 1. | living or able to live both on land and in water; belonging to both land and water. |
| 2. | Also, amphibian. capable of operating on both land and water: amphibious vehicles. |
| 3. | of or pertaining to military operations by both land and naval forces against the same object, esp. to a military attack by troops landed by naval ships. |
| 4. | trained or organized to fight, or fighting, on both land and sea: amphibious troops. |
| 5. | combining two qualities, kinds, traits, etc.; of or having a mixed or twofold nature. |
| am·phib·i·an (ām-fĭb'ē-ən) n.
[From New Latin Amphibia, class name, from Greek, neuter pl. of amphibios, amphibious : amphi-, amphi- + bios, life; see gwei- in Indo-European roots.] |