binaural

[bahy-nawr-uhl, bin-awr-uhl]
adjective
1.
having two ears.
2.
of, with, or for both ears: binaural hearing; a binaural stethoscope.
3.
(of sound) recorded through two separate microphones and transmitted through two separate channels to produce a stereophonic effect.

Origin:
1875–80; bin- + aural2

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World English Dictionary
binaural (baɪˈnɔːrəl, bɪn-)
 
adj
1.  relating to, having, or hearing with both ears
2.  employing two separate channels for recording or transmitting sound; so creating an impression of depth: a binaural recording
 
bin'aurally
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

binaural
"pertaining to both ears," 1861, from L. bini "twofold, two apiece" (used especially of matched things) + aural. In ref. to electronic recordings, from 1933.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

binaural bin·au·ral (bī-nôr'əl, bĭn-ôr'-)
adj.
Having or relating to both ears.

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
Binaural beat recordings are basically trance-inducers.
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