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单词	directrix
释义	directrix noun di·​rec·​trix də-ˈrek-triks  plural directrixes də-ˈrek-trik-səz  also directrices də-ˈrek-trə-ˌsēz  1 archaic : directress 2 : a fixed curve with which a generatrix maintains a given relationship in generating a geometric figure specifically : a straight line the distance to which from any point of a conic section is in fixed ratio to the distance from the same point to a focus Word History Etymology Medieval Latin, feminine of Late Latin director, from Latin dirigere First Known Use 1622, in the meaning defined at sense 1
随便看	diaglyph diaglyphic diaglyphs diaglyptic diagnosable diagnose diagnoseable diagnosed diagnoses diagnosing diagnosis diagnosis related group diagnostic diagnostical diagnostically diagnosticate diagnostician diagnosticians diagnostics diagometers diagonal diagonal biped diagonal bond diagonal bracing diagonal bridging

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。