Artificial horizon

Artificial horizon
Horizon Ho*ri"zon, n. [F., fr. L. horizon, fr. Gr. ? (sc. ?) the bounding line, horizon, fr. ? to bound, fr. ? boundary, limit.] 1. The line which bounds that part of the earth's surface visible to a spectator from a given point; the apparent junction of the earth and sky. [1913 Webster]

And when the morning sun shall raise his car Above the border of this horizon. --Shak. [1913 Webster]

All the horizon round Invested with bright rays. --Milton. [1913 Webster]

2. (Astron.) (a) A plane passing through the eye of the spectator and at right angles to the vertical at a given place; a plane tangent to the earth's surface at that place; called distinctively the sensible horizon. (b) A plane parallel to the sensible horizon of a place, and passing through the earth's center; -- called also {rational horizon} or {celestial horizon}. (c) (Naut.) The unbroken line separating sky and water, as seen by an eye at a given elevation, no land being visible. [1913 Webster]

3. (Geol.) The epoch or time during which a deposit was made. [1913 Webster]

The strata all over the earth, which were formed at the same time, are said to belong to the same geological horizon. --Le Conte. [1913 Webster]

4. (Painting) The chief horizontal line in a picture of any sort, which determines in the picture the height of the eye of the spectator; in an extended landscape, the representation of the natural horizon corresponds with this line. [1913 Webster]

5. The limit of a person's range of perception, capabilities, or experience; as, children raised in the inner city have limited horizons. [PJC]

6. [fig.] A boundary point or line, or a time point, beyond which new knowledge or experiences may be found; as, more powerful computers are just over the horizon. [PJC]

{Apparent horizon}. See under {Apparent}.

{Artificial horizon}, a level mirror, as the surface of mercury in a shallow vessel, or a plane reflector adjusted to the true level artificially; -- used chiefly with the sextant for observing the double altitude of a celestial body.

{Celestial horizon}. (Astron.) See def. 2, above.

{Dip of the horizon} (Astron.), the vertical angle between the sensible horizon and a line to the visible horizon, the latter always being below the former.

{Rational horizon}, and {Sensible horizon}. (Astron.) See def. 2, above.

{Visible horizon}. See definitions 1 and 2, above. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Artificial horizon — Artificial Ar ti*fi cial, a. [L. artificialis, fr. artificium: cf. F. artificiel. See {Artifice}.] 1. Made or contrived by art; produced or modified by human skill and labor, in opposition to natural; as, artificial heat or light, gems, salts,… …   The Collaborative International Dictionary of English

  • artificial horizon — n. a gyroscopic instrument on an aircraft for indicating the true horizon and the position of the craft with reference to it; flight indicator …   English World dictionary

  • artificial horizon — dirbtinis horizontas statusas T sritis Standartizacija ir metrologija apibrėžtis Plokščias veidrodinis paviršius, statmenas sunkio jėgos krypčiai. atitikmenys: angl. artificial horizon; false horizon vok. künstlicher Horizont, m rus.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • artificial horizon — dirbtinis horizontas statusas T sritis fizika atitikmenys: angl. artificial horizon; false horizon vok. künstlicher Horizont, m rus. искусственный горизонт, m pranc. horizon artificiel, m …   Fizikos terminų žodynas

  • Artificial horizon — Ein künstlicher Horizont (engl. attitude indicator oder artificial horizon auch gyro horizon) ersetzt den natürlichen Horizont, der die Grenzlinie zwischen der sichtbaren Erde und dem Himmel darstellt, wenn man den Horizont nicht sehen kann oder… …   Deutsch Wikipedia

  • artificial horizon — padėties erdvėje rodytuvas statusas T sritis Gynyba apibrėžtis Prietaisas, kuris vaizduoja orlaivio padėtį erdvėje pagal paties prietaiso arba iš išorės gaunamą informaciją. Dar jis vadinamas aviahorizontu. atitikmenys: angl. artificial horizon;… …   NATO terminų aiškinamasis žodynas

  • artificial horizon — i. A gyro operated flight instrument that shows the pitching and banking attitudes of an aircraft with respect to a reference line horizon, within limited degrees of movement, by means of the relative position of lines or marks on the face of the …   Aviation dictionary

  • artificial horizon — 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 called flight indicator, gyro horizon. Aeron. an instrument that indicates the… …   Universalium

  • artificial horizon — noun An instrument that displays the pitch and roll of an aircraft in flight by comparing its attitude to a gyroscopically maintained indication of the flat horizon line. Syn: attitude indicator, gyro horizon …   Wiktionary

  • artificial horizon — noun a navigational instrument based on a gyroscope; it artificially provides a simulated horizon for the pilot • Syn: ↑gyro horizon, ↑flight indicator • Hypernyms: ↑navigational instrument …   Useful english dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”