Definition of triphibious
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
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Origin and Etymology of triphibious
tri- + -phibious (as in amphibious)
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