DuckCorp Dico

Found one definition

1.                 From en.wiktionary.org:
                   
   
   
                   
                     
   
   ** English
   [quadraphonic sound]
   
   *** Alternative forms
   
    - [en]
   *** Etymology
   From [en].
   
   *** Adjective
   [-]
   
    1. [en]  Employing four independent channels or speakers.
   **** Synonyms
   
    - [en]
   *** See also
   
    - [en]
   [en]