oval of Cassini
oval of Cassini[′ō·vəl əv kə′sē·nē]
An ovallike curve similar to a lemniscate obtained as the locus corresponding to a general type of quadratic equation in two variables x and y; it is expressed as [(x + a)2+ y 2] [(x-a)2+ y 2] = k 4, where a and k are constants. Also known as Cassinian oval.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.