/ æmˈfɪbiəs; NAmE / adjective
1.
able to live both on land and in water
2.
( of military operations ) involving soldiers landing at a place from the sea
3.
suitable for use on land or water :
amphibious vehicles
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WORD ORIGIN
mid 17th cent.: from modern Latin amphibium , from Greek amphibion (noun use of amphibios living both in water and on land, from amphi both + bios life) + -ous .