Con"ic (?), Con"ic*al (?), a. [Gr. : cf. F. conique. See Cone.]
Having the form of, or resembling, a geometrical cone; round and tapering to a point, or gradually lessening in circumference; as, a conic or conical figure; a conical vessel.
Of or pertaining to a cone; as, conic sections.
Conic section Geom., a curved line formed by the intersection of the surface of a right cone and a plane. The conic sections are the parabola, ellipse, and hyperbola. The right lines and the circle which result from certain positions of the plane are sometimes, though not generally included. -- Conic sections, that branch of geometry which treats of the parabola, ellipse, and hyperbola. -- Conical pendulum. See Pendulum. -- Conical projection, a method of delineating the surface of a sphere upon a plane surface as if projected upon the surface of a cone; -- much used by makers of maps in Europe. -- Conical surface Geom., a surface described by a right line moving along any curve and always passing through a fixed point that is not in the plane of that curve.
© Webster 1913.