amphibious (
http://definr.com/amphibious)
adj 1: relating to military forces prepared for operations launched
from the sea against an enemy shore; "amphibious
troops"
2: relating to or characteristic of animals of the class
Amphibia [syn:
amphibian]
3: operating or living on land and in water; "amphibious
vehicles"; "amphibious operations"; "amphibious troops";
"frogs are amphibious animals" [ant:
aquatic,
terrestrial]