acoustic meatus

n.

The passage leading inward through the tympanic portion of the temporal bone, from the auricle to the tympanic membrane; external acoustic meatus.
A canal running through the petrous portion of the temporal bone, giving passage to the facial and vestibulocochlear nerves and to the labyrinthine artery and veins; internal acoustic meatus.

Nearby words

  1. antifriction bearing,
  2. antifriction metal,
  3. antifungal,
  4. antigalaxy,
  5. antigay,
  6. antigen excess,
  7. antigen unit,
  8. antigen-antibody reaction,
  9. antigen-presenting cell,
  10. antigenemia


The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.