agonic line
noun
: an imaginary line on the earth's surface connecting the north and south magnetic poles and passing through those points where there is no magnetic declination and where a freely suspended magnetic needle indicates true north compare aclinic line, isogonic line
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“Agonic line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/agonic%20line. Accessed 30 Nov. 2024.
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