DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   diaphragm
       n 1: a mechanical device in a camera that controls size of
            aperture of the lens; "the new cameras adjust the diaphragm
            automatically" [syn: diaphragm, stop]
       2: (anatomy) a muscular partition separating the abdominal and
          thoracic cavities; functions in respiration [syn:
          diaphragm, midriff]
       3: a contraceptive device consisting of a flexible dome-shaped
          cup made of rubber or plastic; it is filled with spermicide
          and fitted over the uterine cervix [syn: diaphragm,
          pessary, contraceptive diaphragm]
       4: electro-acoustic transducer that vibrates to receive or
          produce sound waves