di ‧ a ‧ phragm /ˈdaɪəfræm/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Late Latin ; Origin: diaphragma , from Greek diaphrassein 'to make a fence across, block' ]
1 . the muscle that is between your lungs and your stomach, and that you use when you breathe
2 . a round rubber object that a woman can put inside her ↑ vagina to stop her from getting ↑ pregnant
3 . technical a thin round object, especially in a telephone or ↑ loudspeaker , that is moved by sound or that moves when it produces sound
4 . technical a round flat part inside a camera that controls the amount of light that enters the camera