Pronunciation: (lem-nis'kit, lem'nis-kāt", -kit), [key]
—n. Analyt. Geom.
a plane curve generated by the locus of the point at which a variable tangent to a rectangular hyperbola intersects a perpendicular from the center to the tangent. Equation: r 2=2a2cosθ. Also called Bernoulli's lemniscate.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.