Science Dictionary
tinnitus   (tĭn'ĭ-təs, tĭ-nī'-)  Pronunciation Key 
A buzzing, ringing, or whistling sound in one or both ears occurring without an external stimulus. Its causes include ear infection or blockage, certain drugs, head injury, and neurologic disease.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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