Magnetic declination

noun

Definitions

Noun
  1. 1
    The horizontal angle between magnetic north and true north at a given place. countable, uncountable

    "In the Ste Genevieve District, magnetic declination varies significantly within short distances due to iron-rich bedrock, and this might account for magnetic declinations varying from five to ten degrees east in Soulard's surveys."

  2. 2
    the angle (at a particular location) between magnetic north and true north wordnet

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