| 单词 | amphibian |
| 释义 | amphibian (once / 8118 pages) 1nadj 2n An amphibian is a cold-blooded vertebrate animal that is born in water and breathes with gills. As the larva grows into its adult form, the animal's lungs develop the ability to breathe air, and the animal can live on land. Frogs, toads, and salamanders are all amphibians. The word amphibian comes from the Greek word amphibios, which means to live a double life. The noun amphibian has its roots in the words amphi, meaning of both kinds, and bios, meaning life. The word is used for the class of animals that spend part of their lives in water and part on land. The word can also be used as an adjective to describe the animals that lives this way. You might be interested to know that the largest amphibian weighs about 140 pounds and the smallest weighs only a few grams. WORD FAMILYamphibian: amphibians USAGE EXAMPLESSome fish and amphibians lose teeth as they grow, as do platypuses. BBC(Dec 22, 2016) The serpentine baby boom is a rarity for the zoo, said Ian Recchio, the facility’s curator of reptiles and amphibians. Los Angeles Times(Dec 20, 2016) The tiny amphibian species faces threats from developmental forces, like logging and agricultural expansion. Time(Dec 19, 2016) 1 1n cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form Hypo|Hyper Hynerpeton bassetti fossil amphibian of the Devonian having well-developed forelimbs; found in Pennsylvania Ichyostegaearly tetrapod amphibian found in Greenland caudate, urodeleamphibians that resemble lizards salamanderany of various typically terrestrial amphibians that resemble lizards and that return to water only to breed anuran, batrachian, frog, salientian, toad, toad frogany of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species blindworm, caecilianany of the small slender limbless burrowing wormlike amphibians of the order Gymnophiona; inhabit moist soil in tropical regions labyrinthodontan amphibian of the superorder Labyrinthodontia European fire salamander, Salamandra salamandraa kind of European salamander Salamandra maculosa, fire salamander, spotted salamanderEuropean salamander having dark skin with usually yellow spots Salamandra atra, alpine salamanderovoviviparous amphibian of the Alps newt, tritonsmall usually bright-colored semiaquatic salamanders of North America and Europe and northern Asia ambystomid, ambystomid salamandersmall to moderate-sized terrestrial or semiaquatic New World salamander Cryptobranchus alleganiensis, hellbender, mud puppylarge salamander of North American rivers and streams Megalobatrachus maximus, giant salamanderlarge (up to more than three feet) edible salamander of Asia Proteus anguinus, olmEuropean aquatic salamander with permanent external gills that lives in caves Necturus maculosus, mud puppyaquatic North American salamander with red feathery external gills dicamptodon, dicamptodontidsalamanders found near cold streams throughout the year Dicamptodon ensatus, Pacific giant salamanderlarge (to 7 inches) salamander of western North America Rhyacotriton olympicus, olympic salamandersmall large-eyed semiaquatic salamander of the United States Northwest lungless salamander, plethodontmostly terrestrial salamanders that breathe through their thin moist skin; lay eggs in moist places on land; rarely enter water Plethodon cinereus, eastern red-backed salamandercommon salamander of eastern North America Plethodon vehiculum, western red-backed salamandersalamander of the Pacific coast of North America dusky salamandercommon North American salamander mottled with dull brown or greyish-black climbing salamanderany of several North American salamanders adapted for climbing with well-developed limbs and long somewhat squared-off toes slender salamander, worm salamanderany of several small slim salamanders of the Pacific coast of the United States web-toed salamanderany of several salamanders with webbed toes and very long extensile tongues; excellent climbers that move with ease over smooth rock surfaces amphiuma, blind eel, congo eel, congo snakeaquatic eel-shaped salamander having two pairs of very small feet; of still muddy waters in the southern United States sireneellike aquatic North American salamander with small forelimbs and no hind limbs; have permanent external gills ranid, true froginsectivorous usually semiaquatic web-footed amphibian with smooth moist skin and long hind legs leptodactylid, leptodactylid frogtoothed frogs: terrestrial or aquatic or arboreal robber frogsmall terrestrial frog of tropical America Hylactophryne augusti, barking frog, robber frogof southwest United States and Mexico; call is like a dog's bark Leptodactylus pentadactylus, South American bullfrog, crapaudlarge toothed frog of South America and Central America resembling the bullfrog tree frog, tree-frogany of various Old World arboreal frogs distinguished from true frogs by adhesive suckers on the toes Ascaphus trui, bell toad, ribbed toad, tailed frog, tailed toadwestern North American frog with a taillike copulatory organ Liopelma hamiltoniprimitive New Zealand frog with four unwebbed toes on forefeet and five on hind feet true toadtailless amphibian similar to a frog but more terrestrial and having drier warty skin Alytes obstetricans, midwife toad, obstetrical toadEuropean toad whose male carries the fertilized eggs wrapped around its hind legs until they hatch Alytes cisternasi, midwife toadsimilar in habit to Alytes obstetricians Bombina bombina, fire-bellied toadtoad of central and eastern Europe having red or orange patches mixed with black on its underside spadefoot, spadefoot toada burrowing toad of the northern hemisphere with a horny spade-like projection on each hind foot tree frog, tree toad, tree-frogarboreal amphibians usually having adhesive disks at the tip of each toe; of southeast Asia and Australia and America Gastrophryne olivacea, western narrow-mouthed toadsmall secretive toad with smooth tough skin of central and western North America Gastrophryne carolinensis, eastern narrow-mouthed toadsmall toad of southeastern United States sheep frogmostly of Central America tongueless frogalmost completely aquatic frog native to Africa and Panama and northern South America South American poison toada South American toad craniate, vertebrate animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium 2adj relating to or characteristic of animals of the class Amphibia 2Syn amphibious 1n a flat-bottomed motor vehicle that can travel on land or water Syn|Hypo|Hyper amphibious vehicle marsh buggy, swamp buggy an amphibious vehicle typically having four-wheel drive and a raised body automotive vehicle, motor vehicle a self-propelled wheeled vehicle that does not run on rails 2n an airplane designed to take off and land on water Syn|Hyper amphibious aircraft aeroplane, airplane, plane an aircraft that has a fixed wing and is powered by propellers or jets |
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