Also found in: Dictionary, Wikipedia.
limaçon[′lim·ə‚sän or ‚lim·ə′sōn]
The locus of points of the plane which in polar coordinates (r,θ) satisfy the equation r = a cos θ + b. Also known as Pascal's limacon.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.