lemniscate of Bernoulli

lemniscate of Bernoulli

[lem′nis·kət əv ber′nü·ē]

(mathematics)

The locus of points (x,y) in the plane satisfying the equation (x ²+ y ²)²= a ²(x ²-y ²) or, in polar coordinates (r,θ), the equation r ²= a ² cos 2θ.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.