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2017 Word of the Year

artificial horizon

noun
1.
a level, as a surface of mercury, used in determining the altitudes of stars.
2.
the bubble in a sextant or octant for aerial use.
3.
Also called flight indicator, gyro horizon. Aeronautics. an instrument that indicates the banking and pitch of an aircraft with respect to the horizon.
Origin of artificial horizon
1795-1805
First recorded in 1795-1805
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for artificial horizon
Historical Examples
  • In making such observations an artificial horizon must be used.

    My Attainment of the Pole Frederick A. Cook
  • But what about the image of the sun upon the artificial horizon?

    My Attainment of the Pole Frederick A. Cook
  • His artificial horizon had been arranged but a short distance away.

    First at the North Pole Edward Stratemeyer
  • Shortly before noon a halt was called, the artificial horizon set up, and the flags and sledge standards displayed.

    The Great Frozen Sea Albert Hastings Markham
  • I had with me an admirable Hadleys sextant, and an artificial horizon, and I corrected the mean refraction of the suns rays.

  • He tipped a lever, watched the artificial horizon tilt slightly.

    Sound of Terror Don Berry
  • He went below into his room, secured the old 226 log of the M.C. Burns and the artificial horizon.

    The Harbor of Doubt Frank Williams
  • The instruments used in taking observations for latitude may be either a sextant and an artificial horizon, or a small theodolite.

    The North Pole Robert E. Peary
  • Murdaugh, always active and efficient, had his artificial horizon ready upon the ice, and gave us an approximate latitude.

  • Our latitude by artificial horizon was 75 24′ 21″ N., about sixty miles from Cape Hotham.

British Dictionary definitions for artificial horizon

artificial horizon

noun
1.
Also called gyro horizon. an aircraft instrument, using a gyroscope, that indicates the aircraft's attitude in relation to the horizontal
2.
(astronomy) a level reflecting surface, such as one of mercury, that measures the altitude of a celestial body as half the angle between the body and its reflection
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
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