isogonic line

noun

Definition of isogonic line 

: an imaginary line or a line on a map joining points on the earth's surface at which the magnetic declination is the same

called also isogonal

First Known Use of isogonic line

circa 1859, in the meaning defined above

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Dictionary Entries near isogonic line

isogeotherm

isogloss

isogonic

isogonic line

isogonism

isograft

isogram

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The first known use of isogonic line was circa 1859

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