| 单词 | diaphragm |
| 释义 | Word Frequency diaphragm(ˈdaɪəˌfræm) noun 1. anatomy any separating membrane, esp the dome-shaped muscular partition that separates the abdominal and thoracic cavities in mammals ▶ Related adjective: phrenic2. a circular rubber or plastic contraceptive membrane placed over the mouth of the uterine cervix before copulation to prevent entrance of sperm 3. any thin dividing membrane 4. 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 5. 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 6. chemistry a. a porous plate or cylinder dividing an electrolytic cell, used to permit the passage of ions and prevent the mixing of products formed at the electrodes b. a semipermeable membrane used to separate two solutions in osmosis 7. botany a transverse plate of cells that occurs in the stems of certain aquatic plants Derived forms diaphragmatic (ˌdaɪəfræɡˈmætɪk) adjective diaphragmatically (ˌdiaphragˈmatically) adverb Word origin C17: from Late Latin diaphragma, from Greek, from dia- + phragma fence |
| 随便看 |
|
英语词典包含233703条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。