Amphibian definition

ăm-fĭbē-ən
Frequency:
An animal capable of living both on land and in water.
noun
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Any amphibious animal or plant.
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Any of various cold-blooded, usually smooth-skinned vertebrates of the class Amphibia, characteristically hatching as an aquatic larva with gills and then transforming into an adult having air-breathing lungs. Frogs, toads, salamanders, and caecilians are amphibians.
noun
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An aircraft that can take off and land on either land or water.
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Any of a class (Amphibia) of coldblooded, scaleless vertebrates, consisting of frogs, toads, newts, salamanders, and caecilians, that usually begin life in the water as tadpoles with gills and later develop lungs.
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adjective
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Any aircraft that can take off from and come down on either land or water.
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Any of various cold-blooded, usually smooth-skinned vertebrates of the class Amphibia, characteristically hatching as an aquatic larva with gills and then transforming into an adult having air-breathing lungs. Frogs, toads, salamanders, and caecilians are amphibians.
noun
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The definition of an amphibian is a cold-blooded animal which can live on land or in water and who breathes with gills when young and with lungs as an adult.

A frog is an example of an amphibian.

noun
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A tank or other vehicle that can travel on either land or water.
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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.
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A vehicle which can operate on land and water.
noun
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Of or relating to the amphibians Amphibia.
adjective
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Capable of operating on both land and water amphibious.
adjective
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A tracked or wheeled vehicle that can operate both on land and in water.
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Of amphibians.
adjective
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Pertaining to the Amphibia.
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An animal of the Amphibia; any four-legged vertebrate that does not have amniotic eggs, living both on land and in water.
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Other Word Forms

Noun

Singular:
amphibian
Plural:
amphibia, amphibians

Origin of amphibian

  • From New Latin Amphibia class name from Greek neuter pl. of amphibios amphibious amphi- amphi- bios life gwei- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek ἀμφίβιον (amphibion), from ἀμφί (amphi, “of both kinds”) + βίος (bios, “life”)

    From Wiktionary