| 单词 | mediastinum |
| 释义 | Word Frequency mediastinum(ˌmiːdɪəˈstaɪnəm) nounWord forms: plural -na (-nə) anatomy 1. a membrane between two parts of an organ or cavity such as the pleural tissue between the two lungs 2. the part of the thoracic cavity that lies between the lungs, containing the heart, trachea, etc Derived forms mediastinal (ˌmediasˈtinal) adjective Word origin C16: from medical Latin, neuter of Medieval Latin mediastīnus median, from Latin: low grade of servant, from medius mean |
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