agonic line

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a·gon·ic line

 (ā-gŏn′ĭk, ə-)
n.
An imaginary line on the earth's surface connecting points where the magnetic declination is zero.

[Greek agōnos, having no angle (a-, without; see a-1 + gōniā, angle; see diagonal) + -ic.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

agonic line

n
(General Physics) an imaginary line on the surface of the earth connecting points of zero magnetic declination
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

agonic line

A line drawn on a map or chart joining points of zero magnetic declination for a specified year date. See also magnetic declination.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.agonic line - an imaginary line connecting points on the Earth's surface where the magnetic declination is zeroagonic line - an imaginary line connecting points on the Earth's surface where the magnetic declination is zero
line - a spatial location defined by a real or imaginary unidimensional extent
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