New Latin cōnicusfrom Greek kōnikosfromkōnosconekō- in Indo-European roots
John Casey, professor of mathematics at the Catholic university of Dublin, has given elementary demonstrations founded on the theory of similitude and coaxal circles which are reproduced in his Sequel to Euclid; an analytical solution by Gergonne is given in Salmon's Conic Sections.
Cubic equations were solved geometrically by determining the intersections of conic sections.
It is therefore a conic section having its eccentricity equal to unity.
HYPERBOLA, a conic section, consisting of two open branches, each extending to infinity.
as the conic having an eccentricity greater than unity, is a convenient starting-point for the Euclidian investigation.