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Conic section   /kˈɑnɪk sˈɛkʃən/   Listen
adjective
Conical, Conic  adj.  
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.
2.
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.





Collaborative International Dictionary of English 0.48


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"Conic section" Quotes from Famous Books



... captain, "a parabola is a conic section arising from cutting a cone by a plane parallel to ...
— The Moon-Voyage • Jules Verne
... must remember, he's true to his first love. Culture came to him first, while yet he abode in Philistia, under the playful disguise of a conic section. He scaled his way out of Gath by means of a treatise on elementary trigonometry, and evaded Askelon on the wings of an undulatory theory of light. It is different with us, you know, who have emerged from the land of darkness by the regular classical and literary highway. We feed upon Rabelais ...
— Philistia • Grant Allen
... with perfect fidelity the movements of a planet in its revolution around the sun belongs to that well-known group of curves which mathematicians describe as the conic sections. The particular form of conic section which denotes the orbit of a planet is known by the name of the ellipse: it is spoken of somewhat less accurately as an oval. The ellipse is a curve which can be readily constructed. There is no simpler method of doing so than that which is familiar to draughtsmen, and which ...
— The Story of the Heavens • Robert Stawell Ball


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