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External acoustic meatus

The passage leading inward through the tympanic portion of the temporal bone, from the auricle to the tympanic membrane; it consists of a bony (inner) portion and a fibrocartilaginous (outer) portion, the cartilaginous external acoustic meatus.

Synonym: meatus acusticus externus, acoustic Meatus, antrum auris, auditory canal, external auditory meatus.