triphibious adjective. [trʌɪ'fɪbɪǝs] M20.
[from TRI- + AM)PHIBIOUS.]
Capable of existing or operating in three different spheres, esp. on land, on water, and in the air; spec. of or pertaining to military operations involving land, sea, and air forces.

■ triphibiously adverb (rare) L20.

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