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Definition of Ear, outer

Ear, outer: The part of the ear that is visible along the side of the head. The outer ear consists of the pinna, or auricle (the visible projecting portion of the ear), the external acoustic meatus (the outside opening to the ear canal), and the external ear canal, which leads to the eardrum. The outer ear concentrates air vibrations on the eardrum to make the eardrum vibrate.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=7015
Last Editorial Review: 3/19/2012

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