diaphragm Pronunciation: /ˈdaɪəfræm/Translate diaphragm | into French | into Italian | into Spanish German translation of diaphragmn. Diaphragma (fachspr.); [Anat. also] Zwerchfell; [Photog. also] Blendediaphragm in other Oxford dictionaries Definition of diaphragm in the British & World English dictionary Definition of diaphragm in the US English dictionary