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grivation

 - 2 dictionary results

gri⋅va⋅tion

[gri-vey-shuhn, grahy-]

Origin:
gri(d) + v(ari)ation

grid variation

–noun Navigation.
the angle, at any point on the surface of the earth, between the magnetic and true meridians passing through that point.
Also called grivation.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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