conductive deafness

[kn-dŭktĭv]
n.
  1. Hearing loss or impairment caused by a defect in part of the ear that conducts sound, specifically the external canal or middle ear.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.