Acoustic

acoustic
    adj 1: of or relating to the science of acoustics; "acoustic
           properties of a hall" [syn: {acoustic}, {acoustical}]
    n 1: a remedy for hearing loss or deafness
    

Acoustic \A*cous"tic\, n.
   A medicine or agent to assist hearing.
   [1913 Webster]
    

Acoustic \A*cous"tic\ (#; 277), a. [F. acoustique, Gr. ?
   relating to hearing, fr. ? to hear.]
   Pertaining to the sense of hearing, the organs of hearing, or
   the science of sounds; auditory.
   [1913 Webster]

   {Acoustic duct}, the auditory duct, or external passage of
      the ear.

   {Acoustic telegraph}, a telegraph making audible signals; a
      telephone.

   {Acoustic vessels}, brazen tubes or vessels, shaped like a
      bell, used in ancient theaters to propel the voices of the
      actors, so as to render them audible to a great distance.
      [1913 Webster]
    

19 Moby Thesaurus words for "acoustic":
      audible, audile, audio, auditory, aural, auricular, hearing,
      hypersonic, otic, otological, otopathic, otoscopic, phonic, sonic,
      subsonic, supersonic, transonic, transsonic, ultrasonic