directrix

名词 n.
中文释义
英 /dɪˈɹɛk.tɹɪks/|/-ˈɹek-/|/daɪ̯-/|/dʌɪ̯-/    美 /dɪˈɹɛk.tɹɪks/|/daɪ̯-/|/dɪˈɹek.tɹɪks/|/dɑe̯-/

英文释义

名词 n.
  1. Female equivalent of director. feminine,form-of
  2. A line used to define a curve or surface; especially a line, the distance from which a point on a conic has a constant ratio to that from the focus.

词形变化

directrixes plural directrices plural directrice alternative

词汇关系

衍生词
conic section directrix graph directrix ruled surface directrix

词源

Learned borrowing from Latin dīrēctrīx. By surface analysis, direct + -trix.
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