DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   A double flat /ɐ dˈʌbəl flˈat/
   A <neut>, Ais <neut>, As <neut>, Aisis <neut>, Ases <neut> [mus.]
      Synonyms: A, A sharp, A flat, A double sharp
    see: A major