| 单词 | rostrums | 
| 释义 | rostrum /rosˈtrəm or rōˈstrŭm/noun
 ORIGIN: L rōstrum beak, from rōdere, rōsum to gnaw rosˈtral adjective 
 rosˈtrāte or rosˈtrated adjective Beaked rostrocarinate /ros-trō-karˈin-āt/ adjective (L carīna keel) beaked and keelednoun A supposed flint implement with beak and keel | 
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