Di*rect"rix (?), n.; pl. E. Directrixes (), L. Directrices ().


A directress.


Jer. Taylor.

2. Geom. (a)

A line along which a point in another line moves, or which in any way governs the motion of the point and determines the position of the curve generated by it; the line along which the generatrix moves in generating a surface.


A straight line so situated with respect to a conic section that the distance of any point of the curve from it has a constant ratio to the distance of the same point from the focus.


© Webster 1913.

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