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.
Con"ic, n. (Math.) A conic section.
Con`i*cal"i*ty (?), n. Conicalness.
Con"ic*al*ly (?), adv. In the form of a cone.
Con"ic*al*ness, n. State or quality of being conical.
Con"i*co- (&?;), a. [See Conic.] A combining form, meaning somewhat resembling a cone; as, conico-cylindrical, resembling a cone and a cylinder; conico-hemispherical; conico-subulate.
Con"i*coid (?), a. [Conic + -oid.] (Math.) Same as Conoidal.
Con"ics (?), n. 1. That branch of geometry which treats of the cone and the curves which arise from its sections.