👉 In geometry, a biconic is a conic section that has two foci and one point of intersection with a line. It can be defined as a locus of all points in a plane for which the sum or difference of distances from any point to these two foci is constant. For example, a circle (biconic) is defined by its center, radius, and focus. A parabola (biconic) has one focus, its directrix, and either a