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amphibian

1 of 2noun
/æmˈfɪbiən/
Forms:amphibians
1

any cold-blooded animal with the ability to live both on land and in water, such as toads, frogs, etc.

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Amphibian refers to a group of cold-blooded vertebrates that spend part of their lives in water and part on land. They are characterized by their ability to absorb oxygen through their skin and are also known for their unique life cycle which includes a larval stage with gills and a metamorphosis to an adult stage with lungs. Amphibians include frogs, toads, salamanders, and newts, and are found all over the world except for Antarctica. They are an important part of many ecosystems, serving as both predators and prey, and their sensitive skin makes them useful for monitoring environmental changes. However, many species of amphibians are facing threats such as habitat destruction, pollution, and disease, and are in danger of extinction.

  • The frog is a well-known amphibian that lays its eggs in water and undergoes metamorphosis from tadpole to adult.
  • Salamanders are amphibians that have a slender body and long tail, often found near freshwater habitats.
  • Toads are amphibians similar to frogs but with dry, warty skin and shorter hind legs, adapted for hopping rather than leaping.
  • Newts are small, brightly colored amphibians that typically inhabit ponds and streams, where they breed and lay eggs.
  • Some amphibians, such as the African clawed frog, are commonly kept as pets in home aquariums.
2

an aircraft designed to take off from and land on water as well as on land

  • The amphibian landed smoothly on the lake.
  • Amphibians are useful for remote areas without airstrips.
  • The pilot flew the amphibian from the water to the runway.
  • The base hosted a fleet of amphibians for coastal patrol.
  • The amphibian carried passengers between islands.
Synonyms:
amphibious aircraft
3

a motor vehicle capable of traveling on both land and water

  • The amphibian drove from the road into the river.
  • Tourists rode an amphibian through the city and into the lake.
  • Military amphibians can cross rivers without bridges.
  • The amphibian's tires and hull allow versatile travel.
  • Drivers need special training to operate amphibians safely.
Synonyms:
amphibious vehicle