[ tăm′bur′, tăm-bur′ ]
A heart sound, usually the aortic- or pulmonic-valve closure sound when it has a booming and ringing quality like that of a drum.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.