D defs.my
Entry 1 sense Webster, 1913

Lemniscata

/(lĕm`nĭs*kā"tȧ)/ · Lem·nis·ca·ta · IPA
01 n. 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 mee…
  1. 1.
    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.(Geom.)