| 单词 | trachea | 
| 释义 | tracheanoun  tra·chea  ˈtrā-kē-ə     plural tracheae ˈtrā-kē-ˌē  -kē-ˌīalso tracheas or trachea 1   : the main trunk of the system of tubes by which air passes to and from the lungs in vertebrates   2   [New Latin, from Medieval Latin]  : vessel sense 3b    also : one of its constituent cellular elements  3   [New Latin]  : one of the air-conveying tubules forming the respiratory system of most insects and many other arthropods    tracheal   ˈtrā-kē-əl adjective | 
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