| 单词 | diaphragm |
| 释义 | diaphragm n. 1. a muscular partition separating the thorax from the abdomen in mammals. 2. a partition in animal and plant tissues. 3. a disc pierced by one or more holes in optical and acoustic systems etc. 4. a device for varying the effective aperture of the lens in a camera etc. 5. a thin contraceptive cap fitting over the cervix. 6. a thin sheet of material used as a partition etc. Phrases and idioms diaphragm pump a pump using a flexible diaphragm in place of a piston. Derivatives diaphragmatic adj. Etymology: ME f. LL diaphragma f. Gk (as DIA-, phragma -atos f. phrasso fence in) |
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