Etymology
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binaural (adj.)

"pertaining to both ears," 1857, from Latin bini "twofold, two apiece" (see binary) + aural. In reference to sound reproduction from electronic recordings, 1933.

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Definitions of binaural

binaural (adj.)
relating to or having or hearing with two ears;
binaural hearing
Synonyms: biaural
From wordnet.princeton.edu