nLemniscata(Geom) 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.
Webster's Revised Unabridged Dictionary
L. lemniscatus, adorned with ribbons, fr. lemniscus, a ribbon hanging down, Gr. lhmni`skos