declinometer

Definitions

  • WordNet 3.6
    • n declinometer an instrument for measuring magnetic declination
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Webster's Revised Unabridged Dictionary
    • n Declinometer (Physics) An instrument for measuring the declination of the magnetic needle.
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Century Dictionary and Cyclopedia
    • n declinometer An instrument for measuring the declination of the magnetic needle, and for observing its variations. In magnetic observatories there are permanent instruments of this kind, and they are commonly made self-registering by photographic means. It is the object of such instruments to register the small hourly and annual variations in declination, and also the variations due to magnetic storms.
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Chambers's Twentieth Century Dictionary
    • Declinometer an instrument for measuring the declination of the compass—i.e. the deviation of the magnetic needle from the true north
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Etymology

Webster's Revised Unabridged Dictionary
Decline, + -meter,
Chambers's Twentieth Century Dictionary
Fr. décliner—L. de, down, away from, clināre, to bend. See Lean.