“Cassini”

The following 2 entries include the term Cassini.

Cassini division

noun

: the dark region between the two brightest rings of Saturn

ovals of Cassini

: a curve that is the locus of points of the vertex of a triangle whose opposite side is fixed and the product of whose adjacent sides is a constant and that has the equation [(x + a)² + y²] [(x − a)² + y²] − k⁴ = 0 where k is the constant and a is one half the length of the fixed side