Definition of amphibian noun from the Oxford Advanced American Dictionary

amphibian

noun
/æmˈfɪbiən/
 
 
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.
compare reptile
Usage noteUsage note: The Living Worldanimalsanimals mate/breed/reproduce/feed (on something)fish/amphibians swim/spawn(= lay eggs)birds fly/migrate/nest/singinsects crawl/fly/bite/stinginsects/bees/locusts swarmbees collect/gather nectar/pollenspiders spin/weave a websnakes/lizards shed their skinsbears/hedgehogs/frogs hibernateinsect larvae grow/develop/pupatean egg/a chick/a larva hatchesattract/find/choose a mateproduce/release eggs/spermlay/fertilize/incubate/hatch eggsinhabit a forest/a reef/the coastmark/enter/defend (a) territorystalk/hunt/capture/catch/kill preyplants and fungitrees/plants grow/bloom/blossom/flowera seed germinates/sproutsleaves/buds/roots/shoots appear/develop/formflower buds swell/opena fungus grows/spreads/colonizes somethingpollinate/fertilize a flower/plantproduce/release/spread/disperse pollen/seeds/sporesproduce/bear fruitdevelop/grow/form roots/shoots/leavesprovide/supply/absorb/extract/release nutrientsperform/increase/reduce photosynthesisbacteria and virusesbacteria/microbes/viruses grow/spread/multiplybacteria/microbes live/thrive in/on somethingbacteria/microbes/viruses evolve/colonize something/cause diseasebacteria break something down/convert something (into something)a virus enters/invades something/the bodya virus mutates/evolves/replicates (itself)be infected with/contaminated with/exposed to a new strain of a virus/drug-resistant bacteriacontain/carry/harbor bacteria/a viruskill/destroy/eliminate harmful/deadly bacteria