- Cassinian oval
- Oval O"val, n.
A body or figure in the shape of an egg, or popularly, of an
ellipse.
[1913 Webster]
{Cassinian oval} (Geom.), the locus of a point the product of whose distances from two fixed points is constant; -- so called from Cassini, who first investigated the curve. Thus, in the diagram, if P moves so that P A.P B is constant, the point P describes a Cassinian oval. The locus may consist of a single closed line, as shown by the dotted line, or of two equal ovals about the points A and B. [1913 Webster] [1913 Webster]

*The Collaborative International Dictionary of English.
2000.*