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polar axis

noun, Mathematics
the fixed line, usually horizontal, from which the angle made by the radius vector is measured in a polar coordinate system.
Origin of polar axis
1890-95 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for polar axis
  • Place the globe so that its polar axis is horizontal to the ground, and place a light source at the same height as the globe.
  • The elliptical orbit does not cause the seasons, the polar axis tilt does.
  • The polar axis conforms with the line of collimation of the solar telescope.
British Dictionary definitions for polar axis

polar axis

the fixed line in a system of polar coordinates from which the polar angle, θ, is measured anticlockwise
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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