- 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.
- an amphibious plant.
- an airplane designed for taking off from and landing on both land and water.
- 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.
- belonging or pertaining to the Amphibia.
- amphibious(def 2).
Origin of amphibian
Examples from the Web for amphibian
The locked controls held the amphibian for perhaps thirty seconds.Under Arctic Ice
Bell had a raft of canes afloat beside the amphibian when she waked.
"You will not be allowed to cause any more trouble," the amphibian declared, coldly.Triplanetary
Edward Elmer Smith
And then we have still the amphibian, the lizard, and the bird or mammal, up to man.Socialism: Positive and Negative
Robert Rives La Monte
But I do think it wise to keep the story of the amphibian and its pilot to ourselves.Dorothy Dixon and the Mystery Plane
- any cold-blooded vertebrate of the class Amphibia, typically living on land but breeding in water. Their aquatic larvae (tadpoles) undergo metamorphosis into the adult form. The class includes the newts and salamanders, frogs and toads, and caecilians
- a type of aircraft able to land and take off from both water and land
- any vehicle able to travel on both water and land
- another word for amphibious
- of, relating to, or belonging to the class Amphibia
Word Origin and History for amphibian
Formerly used by zoologists to describe all sorts of combined natures (including otters and seals), the biological sense "class of animals between fishes and reptiles that live both on land and in water" and the noun derivative both are first recorded 1835. Amphibia was used in this sense from c.1600 and has been a zoological classification since c.1819.
- A cold-blooded, smooth-skinned vertebrate of the class Amphibia. Amphibians hatch as aquatic larvae with gills and, in most species, then undergo metamorphosis into four-legged terrestrial adults with lungs for breathing air. The eggs of amphibians are fertilized externally and lack an amnion. Amphibians evolved from lobe-finned fish during the late Devonian Period and include frogs, toads, newts, salamanders, and caecilians.
Word History: Amphibians, not quite fish and not quite reptiles, were the first vertebrates to live on land. These cold-blooded animals spend their larval stage in water, breathing through their gills. In adulthood they usually live on land, using their lungs to breath air. This double life is also at the root of their name, amphibian, which, like many scientific words, derives from Greek. The Greek prefix amphi- means both, or double, and the Greek word bios means life. Both these elements are widely used in English scientific terminology: bios, for example, is seen in such words as biology, antibiotic, and symbiotic.