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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

The segment connecting the vertices is called the major axis.

From Textbooks • May 6, 2020

The result is to make the major axis of Mercury’s orbit rotate slowly in space because of the Sun’s gravity alone.

From Textbooks • Oct. 13, 2016

The major axis is always the longest distance across the ellipse, and can be horizontal or vertical.

From Textbooks • Mar. 30, 2016

Its east—west major axis permitted many inventions adopted in one part of Eurasia to spread relatively rapidly to societies at similar latitudes and climates elsewhere in Eurasia.

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