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单词	anhedral
释义	anhedral 1 of 2 adjective an·​he·​dral (ˈ)an-¦hē-drəl : allotriomorphic anhedral 2 of 2 noun an·​he·​dral (ˈ)an-¦hē-drəl  plural anhedrals aeronautics : the angle between a downwardly inclined aircraft wing and a horizontal transverse line The bottom wing had pronounced anhedral; the upper wing, dihedral. William Hallstead, Air & Space/Smithsonian, Feb/Mar 2000 called also negative dihedral Word History Etymology Adjective an- + -hedral Noun an- + (di)hedral First Known Use Adjective 1896, in the meaning defined above Noun circa 1956, in the meaning defined above
随便看	first-degree burn first-desk first-flight cover first-generation first-line first-movement form first-nighter first-order reaction first-page first-person first-rate first-rateness first-rater first-run first-species counterpoint first-strike first-string first-stringer first-time first-world problem first-year first-years firstborn firstborns firstcomer

英语词典包含469781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。