Question

Amphibian

Accepted Answer

Merriam-Webster's Collegiate Dictionaryam·phib·i·an \-bē-ən\ noun ETYMOLOGY  ultimately from Greek amphibion amphibious being, from neuter of amphibios
 DATE  1835
1. an amphibious organism; especially : any of a class (Amphibia) of cold-blooded vertebrates (as frogs, toads, or salamanders) intermediate in many characters between fishes and reptiles and having gilled aquatic larvae and air-breathing adults2. an amphibious vehicle; especially : an airplane designed to take off from and land on either land or water• amphibian adjective
English Etymologyamphibian  1630s, "having two modes of existence, of doubtful nature," from Gk. amphibia, neut. pl. of amphibios, from amphi- "of both kinds" + bios "life" (see bio-). Formerly used by zoologists to describe all sorts of combined natures (including otters and seals), the biological sense "class of animals between fishes and reptiles that live both on land and in water" and the noun derivative both are first recorded 1835. Amphibia was used in this sense from c.1600 and has been a zoological classification since c.1819.
Oxford Advanced Learner's Dictionary-牛津双解-OALD7amphibianam·phib·ian / Am5fibiEn / noun   any animal that can live both on land and in water. Amphibians have cold blood and skin without scales . Frogs , toads and newts are all amphibians.   两栖动物⇨ compare reptile
Webster's Third New International Dictionary, Unabridgedam·phib·ianI. \(ˈ) ̷ ̷| ̷ ̷ēən\ adjectiveEtymology: Greek amphibios + English -an1. : amphibious2. [New Latin Amphibia + English -an] : of, relating to, or belonging to the class Amphibia3. [amphibian (II) (vehicle)] : of or relating to an amphibian (sense 3)II. noun(-s)1.  a. : an animal or plant accustomed or adapted to life both on land and in the water (as certain snakes) b. : any animal of the class Amphibia (as a frog or newt)2. : an airplane designed to take off from and land on either land or water < an amphibian … is perhaps the most difficult of all airplane types to build and design — T.A.Dickinson >3. : a flat-bottomed vehicle that moves on tracks having finlike extensions by means of which it is propelled on land or water and that is typically used for landing assault troops

Land Amphibian An Noun Water Amphibia Class Airplane