Hypertext Webster Gateway: "Agonic"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Agonic \A*gon"ic\, a. [Gr. ? without angles; 'a priv. + ? an
angle.]
Not forming an angle.
{Agonic line} (Physics), an imaginary line on the earth's
surface passing through those places where the magnetic
needle points to the true north; the line of no magnetic
variation. There is one such line in the Western
hemisphere, and another in the Eastern hemisphere.
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