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ellipse

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ellipse

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Technical terms used to describe an ellipse; for all points on the ellipse, the sum of the distances from the two foci, F1 and F2, is the same.

Curve joining all points (loci) around two fixed points (foci) such that the sum of the distances from those points is always constant. The diameter passing through the foci is the major axis, and the diameter bisecting this at right angles is the minor axis. An ellipse is one of a series of curves known as conic sections. A slice across a cone that is not made parallel to, and does not pass through, the base will produce an ellipse.



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? Mentioned in ? References in classic literature
 
Regarding the path described by the moon in her revolution round the earth, the Cambridge Observatory had demonstrated that this path is a re-entering curve, not a perfect circle, but an ellipse, of which the earth occupies one of the
From The Earth To The Moon by Verne, Jules View in context
The race course was a large three-mile ring of the form of an ellipse in front of the pavilion.
Anna Karenina by Tolstoy, Leo View in context
At first, no result at all crowned my efforts, though I 'divided my swift mind,' now hither, now thither, in a way that I felt sure would have made AEneas green with envy: but the dimly-seen oval remained as provokingly blank as ever--a mere Ellipse, as if in some mathematical diagram, without even the Foci that might be made to do duty as a nose and a mouth.
Sylvie and Bruno by Carroll, Lewis View in context
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