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directrixes

  • n. 准线;<古>女导演(directrix 的复数)

专业释义英英释义

  • 准线

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Directrix

  • abstract: In mathematics, a directrix is a straight line associated to a geometric object, such as:

以上来源于: WordNet

 柯林斯英汉双解大词典 

directrix /dɪˈrɛktrɪks, daɪ-/

  • 1. 

    N a fixed reference line, situated on the convex side of a conic section, that is used when defining or calculating its eccentricity 准线 [geometry]

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