/ ˈdaɪəfræm; NAmE / noun
( anatomy ) the layer of muscle between the lungs and the stomach, used especially to control breathing
( BrE also cap ) a rubber or plastic device that a woman places inside her vagina before having sex to prevent sperm from entering the womb and making her pregnant
any thin piece of material used to separate the parts of a machine, etc.
( technical ) a thin disc used to turn electronic signals into sound and sound into electronic signals in telephones, loudspeakers , etc.
late Middle English : from late Latin diaphragma , from Greek , from dia through, apart + phragma a fence.