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major axis

American  

noun

Mathematics.
  1. the axis of an ellipse that passes through the two foci.


major axis British  

noun

  1. the longer or longest axis of an ellipse or ellipsoid

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of major axis

First recorded in 1850–55

Example Sentences

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See Examples For:

When b > a, the major axis is vertical so the distance from the center to the vertex is b.

From Textbooks May 6, 2020

A segment perpendicular to the major axis that passes through the center and intersects the ellipse in two points is called the minor axis.

From Textbooks May 6, 2020

The ratio of the distance between the foci to the length of the major axis is called the eccentricity of the ellipse.

From Textbooks Oct. 13, 2016

Now that the equation is in standard form, we can determine the position of the major axis.

From Textbooks Feb. 13, 2015

Eurasia’s east-west major axis, unlike the Americas’ north-south major axis, permitted diffusion without change in latitude and associated environmental variables.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond

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