diaphragm
noun /ˈdaɪəfræm/
/ˈdaɪəfræm/
- (anatomy
解剖学 膈；膈膜；横膈膜 - (British English 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
子宫帽（避孕用具） - any thin piece of material used to separate the parts of a machine, etc.
（机器等的）隔膜，隔板 - (specialist) a thin disc used to turn electronic signals into sound and sound into electronic signals in phones, loudspeakers, etc.
（电话机、扬声器等的）膜片，膜件，振动膜
词源late Middle English: from late Latin diaphragma, from Greek, from dia ‘through, apart’ + phragma ‘a fence’.