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# conic section

noun, Geometry.
1.
a curve formed by the intersection of a plane with a right circular cone; an ellipse, a circle, a parabola, or a hyperbola.
Also called conic.
Origin of conic section
1655-1665
First recorded in 1655-65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for conic section
Historical Examples
• In order to do this, we must first determine the social properties of a conic section.

P. Hampson
• The Confederacy has flanked the conic section, and is trying to escape.

Robert H. Newell
• Parabola, a conic section formed by the intersection of a cone by a plane parallel to one of its sides.

Edited by Rev. James Wood
• We are now almost able to see what the conic section has to do with a soap-bubble.

C. V. Boys
• Excluding the general group itself, every one of these leaves either a point, a line, or a conic section unaltered.

British Dictionary definitions for conic section

## conic section

noun
1.
one of a group of curves formed by the intersection of a plane and a right circular cone. It is either a circle, ellipse, parabola, or hyperbola, depending on the eccentricity, e, which is constant for a particular curve e = 0 for a circle; e<1 for an ellipse; e = 1 for a parabola; e>1 for a hyperbola Often shortened to conic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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conic section in Science
 conic section   A curve formed by the intersection of a plane with a cone. Conic sections can appear as circles, ellipses, hyperbolas, or parabolas, depending on the angle of the intersecting plane relative to the cone's base.
The American Heritage® Science Dictionary
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### Difficulty index for conic section

Few English speakers likely know this word

### Word Value for conic

9
12
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