Meaning of limaçon

lim•a•çon

Pronunciation: (lim'u-son"), [key]
— n. Geom.
  1. a plane curve generated by the locus of a point on a line at a fixed distance from the point of intersection of the line with a fixed circle, as the line revolves about a point on the circumference of the circle. Equation:cos&thgr; + b. Also called r = a
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.