external ear

noun
the outer portion of the ear, consisting of the auricle and the canal extending to the tympanic membrane.
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Collins
World English Dictionary
external ear
 
n
the part of the ear consisting of the auricle and the auditory canal

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Medical Dictionary

external ear n.
The outer portion of the ear including the auricle and the passage leading to the eardrum. Also called outer ear.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
When you speak, sound energy spreads in the air around you and reaches your cochlea through your external ear by air conduction.
Snakes don't have external ear parts, but they do have fully formed inner ears that are connected to the jawbone.
All chameleons lack ears and have no visible external ear drum.
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