conic

CONIC, CONICAL, a. [L., Gr., See Cone.]

1. Having the form of a cone; round and decreasing to a point; as a conic figure; a conical vessel

2. Pertaining to a cone; as conic sections.

Conic Section, a curve line formed by the intersection of a cone and plane. The conic sections are the parabola, hyperbola, and ellipsis.