| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024di•a•phragm /ˈdaɪəˌfræm/USA pronunciation n. [countable]- Anatomya wall of muscle separating two cavities, esp. separating the chest and lungs from the stomach and abdomen:When the diaphragm contracts uncontrollably, you get hiccups.
- Physicsa thin disk that vibrates when receiving or producing sound waves, such as in a telephone.
- Medicinea thin, dome-shaped contraceptive device usually of rubber, that covers the cervix.
- Opticsa device in a camera that controls the amount of light entering the instrument.
WordReference Random House Unabridged Dictionary of American English © 2024di•a•phragm (dī′ə fram′),USA pronunciation n. - [Anat.]
- Anatomya muscular, membranous or ligamentous wall separating two cavities or limiting a cavity.
- Anatomythe partition separating the thoracic cavity from the abdominal cavity in mammals.
- Chemistry[Physical Chem.]
- a porous plate separating two liquids, as in a galvanic cell.
- a semipermeable membrane.
- Physicsa thin disk that vibrates when receiving or producing sound waves, as in a telephone, microphone, speaker, or the like.
- MedicineAlso called pessary. a thin, dome-shaped device, usually of rubber, for wearing over the uterine cervix during sexual intercourse to prevent conception.
- Opticsa plate with a hole in the center or a ring that is placed on the axis of an optical instrument, as a camera, and that controls the amount of light entering the instrument.
- Mechanical Engineeringa plate or web for stiffening metal-framed constructions.
v.t. - to furnish with a diaphragm.
- Photographyto reduce the aperture of (a lens, camera, etc.) by means of a diaphragm.
- Greek diáphragma the diaphragm, midriff, equivalent. to dia- dia- + phrágma a fence
- Late Latin diaphragma
- Middle English diafragma 1350–1400
Collins Concise English Dictionary © HarperCollins Publishers:: diaphragm /ˈdaɪəˌfræm/ n - any separating membrane, esp the dome-shaped muscular partition that separates the abdominal and thoracic cavities in mammals
- a circular rubber or plastic contraceptive membrane placed over the mouth of the uterine cervix before copulation to prevent entrance of sperm
- any thin dividing membrane
Also called: stop a disc with a fixed or adjustable aperture to control the amount of light or other radiation entering an optical instrument, such as a camera- a thin disc that vibrates when receiving or producing sound waves, used to convert sound signals to electrical signals or vice versa in telephones, etc
Etymology: 17th Century: from Late Latin diaphragma, from Greek, from dia- + phragma fencediaphragmatic /ˌdaɪəfræɡˈmætɪk/ adj |