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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.

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

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

Determine whether the major axis is horizontal or vertical.

From Textbooks • May 6, 2020

The segment connecting the vertices is called the major axis.

From Textbooks • May 6, 2020

They were most rapid in Eurasia, because of its east-west major axis and its relatively modest ecological and geographical barriers.

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

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