diaphragm

n 1 wall of muscle, between the chest and the abdomen, that helps to control breathing 膈; 膈膜; 横膈膜. =>illus at respire 见respire之插图. 2 arrangement of thin plates in a camera that control how much light is let in through the lens 光圈; 光孔; 光阑. 3 vibrating disc or cone producing sound-waves, eg in telephone receivers, loudspeakers, etc 振动膜（如电话听筒及扬声器等中的）. 4 (also Dutch cap, cap) thin plastic or rubber membrane that is fitted over the neck of the womb before intercourse to prevent conception 子宫帽（避孕用具）.

dialectal, dialectic, dialectical, dialectically, dialectician, dialectics, dialog, dialogue, dialogue (US also dialog), dialysis, diamante, diameter, diametre, diametrical, diametrically, diamond, diamond jubilee, diamond wedding, diaper, diaphanous, diarist, diarrhoea (US diarrhea), diary, Diaspora, diastase, diatom, diatonic, diatribe, dibble, dice, dicey, dichotomous, dichotomy, dick, dickens, Dickensian, dicker, dicky, dicky (also dickey), dicky-bird,