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isthmus of auditory tube in Medicine

isthmus of auditory tube

n.
  1. The narrowest portion of the auditory tube at the junction of the cartilaginous and bony portions.isthmus of eustachian tube
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.