Meaning of artificial horizon

artifi'cial hori'zon

Pronunciation: [key]
  1. a level, as a surface of mercury, used in determining the altitudes of stars. Cf. level (def. 7).
  2. the bubble in a sextant or octant for aerial use.
  3. Also calledan instrument that indicates the banking and pitch of an aircraft with respect to the horizon.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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