lemniscate

Lem`nis*ca"ta, Lem*nis"cate, n. Etym: [L. lemniscatus adorned with ribbons, fr. lemniscus a ribbon having down, Gr. (Geom.) Defn: A curve in the form of the figure 8, with both parts symmetrical, generated by the point in which a tangent to an equilateral hyperbola meets the perpendicular on it drawn from the center.

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