directrix

Female equivalent of director.

Noun

  1. Female equivalent of director.
  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.

Origin

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

Forms

directrixes directrices directrice

Derived

conic section directrix graph directrix ruled surface directrix

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