[1] : The Collaborative International Dictionary of English v.0.48

auditory \au"ditory\, a. l. auditorius.
   of or pertaining to hearing, or to the sense or organs of
   hearing; as, the auditory nerve. see ear.
   1913 webster

   auditory canal anat., the tube from the auditory meatus
      or opening of the ear to the tympanic membrane.
      1913 webster
see also:
ear auditory canal 

[2] : WordNet (r) 2.0

auditory canal
     n : either of the passages in the outer ear from the auricle to
         the tympanic membrane syn: auditory meatus, acoustic
         meatus, ear canal, external auditory canal
see also:
auditory meatus acoustic meatus ear canal external auditory canal 

Auditory Canal >> A Words
Auditory Canal, definition of term: Auditory Canal
auditory+canal_pag1.html

Auditory >> A Words
Auditory, definition of term: Auditory
auditory_pag1.html

Canal >> C Words
Canal, definition of term: Canal
canal_pag1.html

Auditory Nerve >> A Words
Auditory Nerve, definition of term: Auditory Nerve
auditory+nerve_pag1.html

Auditory Meatus >> A Words
Auditory Meatus, definition of term: Auditory Meatus
auditory+meatus_pag1.html

Stone Canal >> S Words
Stone Canal, definition of term: Stone Canal
stone+canal_pag1.html

Root Canal >> R Words
Root Canal, definition of term: Root Canal
root+canal_pag1.html

Ear Canal >> E Words
Ear Canal, definition of term: Ear Canal
ear+canal_pag1.html

Erie Canal >> E Words
Erie Canal, definition of term: Erie Canal
erie+canal_pag1.html