diaphragm
/ˈdaɪəfræm/noun
1
- a dome-shaped muscular partition separating the thorax from the abdomen in mammals. It plays a major role in breathing, as its contraction increases the volume of the thorax and so inflates the lungs.（哺乳动物体内分隔胸腔和腹腔的）隔膜。
2
- a thin sheet of material forming a partition分隔薄膜。
2.1
- a taut flexible membrane in mechanical or acoustic systems（机械或音响系统中的）膜片。
2.2
- a thin contraceptive cap fitting over the cervix（避孕用的）子宫帽。
3
- a device for varying the effective aperture of the lens in a camera or other optical system（摄影机或其他光学系统的）光圈调节器。
派生词
diaphragmatic
adjective词源
late Middle English: from late Latin diaphragma, from Greek， from dia 'through， apart' + phragma 'a fence'.