directrix
directrix
Definition
di·rec·trix (də rek′triks; also dī-)
noun pl. -·trix′es or -·tri′·cesdī′rek trī′sēz
- Rare a woman director
- Geom.
- a fixed line associated with a conic section and its focus and eccentricity
- the curve that bounds the base of a cone or cylinder
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