A rare architectural or anatomical term describing a structure with entrances or openings on both sides, or a dual-chambered passage.
From Greek 'amphi-' (both) + 'thyra' (door/entrance). This appears to be a highly specialized classical architectural term, rarely used in modern English.
Ancient Greek architects loved wordplay—they literally built rooms you could enter from either side and called them 'both-doors,' which is exactly what 'amphiphithyra' means when you break it down.
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