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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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The segment connecting the vertices is called the major axis.

From Textbooks • May 6, 2020

Since the major axis is horizontal and the distance from the center to the vertex is 40, we know a = 40 and so a2 = 1600 .

From Textbooks • May 6, 2020

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

From Textbooks • May 6, 2020

Determine whether the major axis is horizontal or vertical.

From Textbooks • May 6, 2020

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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