artificial horizon: Meaning and Definition of

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.