(ˈ)trī|fibēəs adjective
Etymology: tri- + -phibious (as in amphibious )
1. : employing, involving, or constituted by land, naval, and air forces and often including airborne troops in coordinated attack
triphibious operations
triphibious forces
triphibious strategy
triphibious warfare
triphibious landing exercises
2. : triphibian 1
triphibious marines
triphibious airplanes