Definitions of directrix
The word directrix uses 9 letters: c, d, e, i, i, r, r, t, x
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Meanings of directrix
n. - A directress.
n. - 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.
n. - 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.
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