homography

Ho*mog"ra*phy, n. 1. That method of spelling in which every sound is represented by a single character, which indicates that sound and no other. 2. (Geom.) Defn: A relation between two figures, such that to any point of the one corresponds one and but one point in the other, and vise versa. Thus, a tangent line rolling on a circle cuts two fixed tangents of the circle in two sets of points that are homographic.

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