keep one's ear to the ground
The organ of hearing, responsible for maintaining equilibrium as well as sensing sound and divided into the external ear, the middle ear, and the inner ear.
The part of this organ that is externally visible.
The sense of hearing.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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