amphibian


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.

amphibian

(ăm-fĭb′ē-ən)
n.
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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

amphibian

(am-fĭb′ē-ăn)
An animal of the class Amphibia.
amphibian, adjective
Medical Dictionary, © 2009 Farlex and Partners

amphibian

a member of the vertebrate class Amphibia, containing frogs, toads, newts, salamanders and the burrowing caecilians. Descended from fish-like animals, they colonized the land in the late DEVONIAN PERIOD. They are thought to be the immediate ancestors of the reptiles, though present-day amphibians are little like their Devonian ancestors. Most amphibians, although normally terrestrial animals, return to water during the breeding season. Fertilization is external (the eggs lacking a shell and embryonic membranes), and the eggs are usually laid and develop in water.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Keywords: Lithobates areolatus, Rana areolata, Micropterus salmoides, Pimephales promelas, amphibian, fish
But Chuck Peterson's ears are tuned to something else: a sound "like someone running their thumb across the teeth of a comb," says the Idaho State professor and co-author of Amphibians & Reptiles of Yellowstone and Grand Teton National Parks.
30 to allow snakes and amphibians some of them considered threatened and endangered in Illinois and the United States to migrate from their summer habitat in the LaRue Swamp across the road to their winter habitat in the limestone bluffs.
Since amphibians are sensitive to environmental changes, the researchers make models for studying how pollution of any type can impact other species.
Amphibians are very sensitive to their environments.
Global amphibian declines: a problem in applied ecology.
Gibbs has locations in the UK (Nuneaton) and New Zealand, utilising engineers and expertise from both countries to continue to develop High Speed Amphibian (HSA) technology and the vehicles designed around it.
* Don't kiss or snuggle with reptiles and amphibians. The CDC has made the following recommendations on selecting a reptile or amphibian pet:
Here we analyze amphibian species that are currently classified as DD and occur in Colombia (IUCN, 2016).
The Declining Amphibian Population Task Force of the International Union for the Conservation of Nature (IUCN) supports CEC's disclosure, saying that ionizing radiation of ultraviolet B resulting from ozone-layer depletion has something to do with the decline of amphibian population worldwide.
"Biologists have known since the 1990s that Bd was behind the decline of many amphibian species, but until now we haven't been able to identify exactly where it came from," said Simon O'Hanlon, of the department of infectious disease epidemiology at Imperial College London, co-author of the report in the journal Science.