Noah Webster
Conical
CONIC, CONICAL adjective [Latin , 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.