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Webster Dictionary (0.00 / 0 votes) Rate this definition: Amphi- a prefix in words of Greek origin, signifying both, of both kinds, on both sides, about, around
n, pl -diums or -dia (-dÉªÉ) 1. a small raised platform used by lecturers, orchestra conductors, etc; dais. 2. (Architecture) a plinth that supports a colonnade or wall. 3. (Architecture) a low wall surrounding the arena of an ancient amphitheatre. 4. (Zoology) zoology. a. the terminal part of a vertebrate limb.