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grivation

[gri-vey-shuh n, grahy-]
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noun
  1. grid variation.
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Origin of grivation

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for grivation

grivation

noun
  1. nautical short for grid variation
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012