artificial horizon

American  

[ahr-tuh-fish-uhl huh-rahy-zuhn] / ˈɑr tə fɪʃ əl həˈraɪ zən /

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.  Also called gyro horizon.  Aeronautics an instrument that indicates the banking and pitch of an aircraft with respect to the horizon.

---

artificial horizon British  

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

---

Etymology

Origin of artificial horizon

First recorded in 1795–1805

Example Sentences

Inspired by a child's spinning top toy, Serson wondered if he could create an artificial horizon - something that would stay level, even as a ship lurched and swayed around it.

From BBC • Apr. 16, 2019

The entire zone which defined the landscape of my life was now bounded by a continuous artificial horizon, formed by the raised parapets and embankments of the motorways and their access roads and interchanges.

From The Guardian • Jul. 4, 2014

Each light bar is long enough to serve as an artificial horizon, telling the pilot if his plane is on even keel.

From Time Magazine Archive

Its instrument panel, with more than 30 dials including the invaluable "artificial horizon," offered practically every known aid to navigation.

From Time Magazine Archive

The sextant and artificial horizon, lying on the ground, escaped destruction, and the dipping-needle had fortunately been taken on board.

From Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle, between the years 1826 and 1836 Volume I. - Proceedings of the First Expedition, 1826-1830 by Fitzroy, Robert