TERMIUM Plus®

From: Translation Bureau

On social media

Consult the Government of Canada’s terminology data bank.

HORIZON DISTANCE [9 records]

Record 1 2022-09-16

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
DEF

A fairly well-defined mass of cloud observed at a distance [that] covers an appreciable portion of the horizon sky but does not extend overhead.

Key term(s)
  • bank of clouds

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
DEF

Masse de nuages bien définie observée à distance [qui] couvre une partie appréciable du ciel à l'horizon, mais ne s'étend pas directement au-dessus de l'observateur.

OBS

Ces nuages ont des dimensions horizontales importantes par rapport à leur extension verticale.

Spanish

Campo(s) temático(s)
  • Fenómenos meteorológicos, climáticos y atmosféricos
DEF

Masa de nubes bastante bien definida observada a distancia [que] abarca una parte apreciable del horizonte, pero no se extiende directamente por encima del observador.

Save record 1

Record 2 2017-05-10

English

Subject field(s)
  • Photography
DEF

A composition rule that divides the scene into three rows and three columns.

OBS

The rule states that the picture is much more interesting if the focal point is not in center of the photo but rather in one of the outlying regions, preferably at one of the intersection points.

OBS

For example, according to the rule, the best placement of a horizon line in a photograph is one-third of the distance from the bottom or top.

French

Domaine(s)
  • Photographie
CONT

La composition est faite selon «la règle des tiers». On obtient une image équilibrée, mais asymétrique, en plaçant le sujet principal sur l'un des quatre croisements des lignes imaginaires partageant l'image par tiers.

Spanish

Save record 2

Record 3 2010-12-10

English

Subject field(s)
  • Mathematical Geography
  • Metrology and Units of Measure
  • Practical Astronomy
DEF

The vertical angle between the zenith and the object which is observed or defined.

OBS

The term zenith distance is more often used in astronomy and is the complement of the altitude. That is : 0° in the zenith, 90° on the horizon, up to 180° at the nadir.

OBS

coaltitude : The complement of altitude, or 90 minus the altitude. The term has significance only when used in connection with altitude measured from the celestial horizon, when it is synonymous with zenith distance.

OBS

zenith distance: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Géographie mathématique
  • Unités de mesure et métrologie
  • Astronomie pratique
DEF

Angle plan formé par la direction d'un objet et la direction du zénith du point d'observation.

CONT

La distance zénithale est la distance angulaire entre le zénith et un point de la sphère céleste, mesurée suivant un méridien.

OBS

La distance zénithale est le complément angulaire de la hauteur.

OBS

distance zénithale : Expression non conseillée.

OBS

distance zénithale; angle zénithal : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 3

Record 4 2007-01-31

English

Subject field(s)
  • Radio Transmission and Reception
  • Radio Waves
DEF

Distance between the point of emission of radio waves and their point of tangency at the earth curvature.

French

Domaine(s)
  • Émission et réception radio
  • Ondes radioélectriques
DEF

Distance entre le point d'émission d'ondes radioélectriques et leur point de tangence à la courbure de la terre.

Spanish

Campo(s) temático(s)
  • Radiotransmisión y radiorrecepción
  • Ondas radioeléctricas
Save record 4

Record 5 2004-11-08

English

Subject field(s)
  • Atmospheric Physics
DEF

Greatest distance at which a black object of suitable dimensions can be seen and recognized against the horizon sky during daylight or could be seen and recognized during the night if the general illumination were raised to the normal daylight level.

CONT

In Seagull_Vis 4000, the visibility of space objects is naturally influenced by pre-set general meteorological visibility conditions, such as fog, rain, and snow; as well as the pre-set cloud density.

CONT

According to the National Weather Service, some of the obstructions to visibility include blowing and widespread dust, fog (including freezing fog and patchy fog), haze, mist, sand and blowing sand, smoke, blowing spray, and volcanic ash. It is reported as "X" in an observation and on the METAR.

OBS

Visibility is reported as statute miles, hundreds of feet or meters.

PHR

Meteorological visibility at night.

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Distance la plus grande à laquelle un objet noir de dimensions appropriées peut être vu et identifié de jour sur le fond du ciel à l'horizon ou, quand il s'agit d'observations de nuit, pourrait être vu et identifié si l'éclairement général augmentait jusqu'à atteindre l'intensité normale en lumière du jour.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
DEF

Distancia máxima a la que puede verse y reconocerse a la luz del día con el cielo del horizonte como fondo, un objeto negro de dimensiones apropiadas o, en el caso de observaciones nocturnas, que pudiera verse y reconocerse si la iluminación se aumentara hasta llegar a los niveles normales de la luz del día.

PHR

Visibilidad nocturna.

Save record 5

Record 6 2004-11-08

English

Subject field(s)
  • Atmospheric Physics
  • Air Pollution
DEF

The greatest distance in a given direction at which it is just possible to see and identify with the unaided eye : a) in the daytime a prominent dark object against the sky at the horizon, and b) at night, a known, preferably unfocused, moderately intense light source.

CONT

Atmospheric visibility is basically a measure of how clear the air is. It is often defined in terms of a visual range (how far an observer can see) and is expressed in nautical miles, miles or kilometers. Precipitation, clouds, and air pollution can reduce atmospheric visibility by increasing the number of small particles in the air that absorb and scatter light.

CONT

... pollutants in the atmosphere can degrade visibility, especially near towns and cities. Usually visibility is affected by natural [meteorological] factors such as fog, sea salt particles or low cloud, but sometimes pollution from human activities decreases visibility by causing haze and smog. Sources of this pollution include emissions from vehicles, pollution from home fires and industrial activities.

OBS

Visibility is quantified in terms of visual range and light extinction, or the maximum distance at which a black object of sufficient size can be seen and recognised in normal daylight.

French

Domaine(s)
  • Physique de l'atmosphère
  • Pollution de l'air
DEF

Plus grande distance à laquelle un objet noir suffisamment gros peut être vu et identifié contre le ciel ou un fond de brouillard.

CONT

Certains phénomènes peuvent réduire la visibilité dans l'atmosphère, par exemple le brouillard, la brume, la brume sèche, la fumée, la neige, la pluie modérée ou forte[, la pollution atmosphérique] et les embruns.

OBS

Dans le cas des observations de nuit, il s'agit de la distance à laquelle cet objet pourrait être vu et identifié si l'illumination générale atteignait l'intensité normale de la lumière du jour. On doit souligner qu'il ne suffit pas d'apercevoir l'objet, mais qu'il faut pouvoir l'identifier.

Spanish

Save record 6

Record 7 2001-10-30

English

Subject field(s)
  • Air Transport
  • Air Traffic Control
OBS

In calculating the radio line-of-sight distance between a ground station and an aircraft station, the distance from the radio horizon of the aircraft station... must be added to the distance from the radio horizon of the ground station.

OBS

radio line-of-sight; RLOS: term and abbreviation officially approved by the International Civil Aviation Organization (ICAO).

French

Domaine(s)
  • Transport aérien
  • Circulation et trafic aériens
OBS

En calculant la distance de l'horizon radio entre une station au sol et une station d'aéronef, il faut ajouter à la distance de l'horizon radio de la station au sol la distance de l'horizon radio de la station d'aéronef [...]

OBS

distance radio à portée optique; RLOS : terme et abréviation uniformisés par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Transporte aéreo
  • Control de tránsito aéreo
OBS

radioalcance óptico; RLOS: término y abreviatura aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).

Save record 7

Record 8 2000-05-10

English

Subject field(s)
  • Aircraft Piloting and Navigation
CONT

The distance, X, of the image above the cockpit cut-off line provides the pilot with a rough idea of his approach slope angle when the horizon is not visible.

Key term(s)
  • cockpit cutoff

French

Domaine(s)
  • Pilotage et navigation aérienne
CONT

La hauteur X de l'image au-dessus de la ligne d'occultation de l'habitacle donne au pilote une idée approximative de l'angle de la pente d'approche lorsque l'horizon n'est pas visible.

Spanish

Save record 8

Record 9 1995-06-19

English

Subject field(s)
  • Astrophysics and Cosmography
DEF

Continually increasing distance beyond which neither light nor any causal influence could yet have traveled since the universe began.

French

Domaine(s)
  • Astrophysique et cosmographie
DEF

[...] limite en distance qui correspond à une vitesse de fuite égale à la vitesse de la lumière pour des objets qui seraient alors vus dans leur état à l'instant zéro du Bing Bang.

Spanish

Save record 9

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2026
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

GCtranslate (available on the Government of Canada network only)

Use this artificial intelligence prototype to translate Government of Canada content up to and including Protected B. Available to employees of selected departments and agencies only.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: