Conic \Con"ic\, Conical \Con"ic*al\, a. [Gr. ?: cf. F. conique.
See Cone.]
1. 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.
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2. Of or pertaining to a cone; as, conic sections.
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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.
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