Emily Dickinson Lexicon

CON'IC, or CON'IC-AL, a. [L. conicus; Gr. κωνικος. 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, hyperabola, and ellipsis. – Bailey.