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major axis

noun, Mathematics
the axis of an ellipse that passes through the two foci.
Origin of major axis
1850-55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for major-axis
Historical Examples
  • Another groove, J, is made along the longitudinal center of the piece B, to receive the spine of the major-axis swivel head.

British Dictionary definitions for major-axis

major axis

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
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