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Line breaks: am¦phib|ian
Pronunciation: /amˈfɪbɪən

Definition of amphibian in English:


1A cold-blooded vertebrate animal of a class that comprises the frogs, toads, newts, salamanders, and caecilians. They are distinguished by having an aquatic gill-breathing larval stage followed (typically) by a terrestrial lung-breathing adult stage.
Example sentences
  • Spadefoot toads are desert-dwelling amphibians that breed opportunistically in short lived pools filled by periodic rainfall.
  • Secondarily aquatic adult amphibians provide another source of diversity.
  • Among vertebrates, newts and other urodele amphibians show a remarkable capacity for regeneration.
1.1A seaplane, tank, or other vehicle that can operate on land and on water.
Example sentences
  • It says no other road-legal amphibian has managed to exceed 6mph on water.
  • Unfortunately for them, in December of 1941 the company was also given the go-ahead to develop an amphibian.


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Relating to amphibians: amphibian eggs
More example sentences
  • In both mammalian and amphibian eggs, integrins have been proposed as putative sperm receptors.
  • In dry years, such as the year of this study, ponds were dry by mid-June, invertebrate and amphibian larvae were unable to develop enough to metamorphose and emerge from the water.
  • Perhaps 10 to 30 percent of Earth's mammal, bird, and amphibian species are facing extinction.


mid 17th century (in the sense 'having two modes of existence or of doubtful nature'): from modern Latin amphibium 'an amphibian', from Greek amphibion (noun use of amphibios 'living both in water and on land', from amphi 'both' + bios 'life').

Definition of amphibian in:

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