TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 OBS

The arc tangent of a number "x" is an angle (or number) whose tangent is "x".  1, fiche 1, Anglais, - arc%20tan

Fiche 1,  Justifications,  Français

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

tangent arcs to 46° halo: Luminous arcs similar to rainbow fragments symmetrically located with respect to the luminary (Sun or Moon) toward which they turn their convexity; when the large halo of 46° is visible, they are tangent to it at points symmetrically placed on the lower semi-circumference of the halo.  2, fiche 2, Anglais, - tangent%20arc%20to%2046%C2%B0%20halo

Record number: 2, Textual support number: 1 OBS

tangent arc to 46° halo: term frequently used in the plural (tangent arcs to 46° halo).  3, fiche 2, Anglais, - tangent%20arc%20to%2046%C2%B0%20halo

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

arcs tangents au halo de 46°: Arcs lumineux semblables à des fragments d'arc-en-ciel, situés symétriquement par rapport à l'astre (Soleil ou Lune) vers lequel ils tournent leur convexité; lorsque le grand halo de 46° est visible, ils lui sont tangents en des points symétriques situés sur la demi-circonférence inférieure du halo.  2, fiche 2, Français, - arc%20tangent%20au%20halo%20de%2046%C2%B0

Record number: 2, Textual support number: 1 OBS

arc tangent au halo de 46°: terme fréquemment utilisé au pluriel (arcs tangents au halo de 46°).  3, fiche 2, Français, - arc%20tangent%20au%20halo%20de%2046%C2%B0

Fiche 2,  Justifications,  Espagnol

Record number: 2, Textual support number: 1 DEF

arcos tangentes al halo de 46°: Arcos luminosos, similares a fragmentos de un arco iris, colocados simétricamente con respecto a la fuente luminosa (el Sol o la Luna) hacia la que vuelven su convexidad. Cuando es visible el halo grande de 46°, los puntos de tangencia se hallan situados simétricamente en la semicircunferencia inferior del halo.  1, fiche 2, Espagnol, - arco%20tangente%20al%20halo%20de%2046%C2%B0

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 DEF

tangent arcs to 22° halo: Luminous arcs tangential to the summit or base of a small halo (22°); their shape vary greatly with the height of the luminary (Sun or Moon) above the horizon.  2, fiche 3, Anglais, - tangent%20arc%20to%2022%C2%B0%20halo

Record number: 3, Textual support number: 1 OBS

tangent arc to 22° halo: term frequently used in the plural (tangent arcs to 22° halo).  3, fiche 3, Anglais, - tangent%20arc%20to%2022%C2%B0%20halo

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 DEF

Arc lumineux, tangent au sommet ou à la base d'un petit halo de 22° et dont la forme varie beaucoup suivant la hauteur de l'astre (Soleil ou Lune) au-dessus de l'horizon.  2, fiche 3, Français, - arc%20tangent%20au%20halo%20de%2022%C2%B0

Record number: 3, Textual support number: 1 OBS

arc tangent au halo de 22°: terme fréquemment utilisé au pluriel (arcs tangents au halo de 22°).  3, fiche 3, Français, - arc%20tangent%20au%20halo%20de%2022%C2%B0

Fiche 3,  Justifications,  Espagnol

Record number: 3, Textual support number: 1 DEF

Arco luminoso tangente a la cima o a la base del halo pequeño (22°). Sus formas varían considerablemente según la altura de la fuente luminosa (el Sol o la Luna) sobre el horizonte.  1, fiche 3, Espagnol, - arco%20tangente%20al%20halo%20de%2022%C2%B0

Fiche 4,  Justifications,  Anglais

Record number: 4, Textual support number: 1 CONT

The above photo shows a halo phenomenon known as the upper tangent arc. When cirrus clouds contain columnar ice crystals aligned so that their axes are all in a horizontal direction, this type of arc may be produced. A characteristic of this arc-shaped patch of light is that it's directly above the Sun (it bends upward away from the Sun), and it's approximately 22 degrees away from the Sun itself - about 2 fists held at arms length.  1, fiche 4, Anglais, - upper%20tangent%20arc

Record number: 4, Textual support number: 2 CONT

The 22° halo is most common, but other halo forms are sometimes seen. The tangent arcs to the 22° halo can appear if the sun's declination is less than 32°. One is called the lower tangent arc to the 22° halo, and the other is the upper tangent arc to the 22° halo. The shape of these tangent haloes depends upon the sun's declination. If the sun is close to the horizon, the two upper arcs angle sharply away from the 22° halo. As the sun rises higher in the sky, the tangent arcs move toward the 22° halo. When the sun's declination reaches 32°above the horizon, the lower and upper tangent arcs make contact, and the resulting ring is called the circumscribed halo. It touches the 22° halo above and beneath the sun. When the sun is just above 32°the circumscribed halo resembles a double oval. As the sun rises higher it becomes increasingly circular and draws nearer to the 22° halo. When the sun's declination exceeds 70°, the circumscribed arc nearly coincides with the 22° halo.  2, fiche 4, Anglais, - upper%20tangent%20arc

Fiche 4,  Justifications,  Français

Record number: 4, Textual support number: 1 CONT

Un peu au-dessus ou au-dessous de l'astre lumineux [soleil], à la distance de 22 degrés, on peut fréquemment voir des arcs supérieurs et inférieurs tangents au petit anneau. En fait, on observe plus souvent les arcs supérieurs; ils ont souvent de belles couleurs. [...] Sur l'image suivante, on voit un arc tangent supérieur.  2, fiche 4, Français, - arc%20tangent%20sup%C3%A9rieur

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

Record number: 5, Textual support number: 1 CONT

The 22° halo is most common, but other halo forms are sometimes seen. The tangent arcs to the 22° halo can appear if the sun's declination is less than 32°. One is called the lower tangent arc to the 22° halo, and the other is the upper tangent arc to the 22° halo. The shape of these tangent haloes depends upon the sun's declination. If the sun is close to the horizon, the two upper arcs angle sharply away from the 22° halo. As the sun rises higher in the sky, the tangent arcs move toward the 22° halo. When the sun's declination reaches 32°above the horizon, the lower and upper tangent arcs make contact, and the resulting ring is called the circumscribed halo. It touches the 22° halo above and beneath the sun. When the sun is just above 32°the circumscribed halo resembles a double oval. As the sun rises higher it becomes increasingly circular and draws nearer to the 22° halo. When the sun's declination exceeds 70°, the circumscribed arc nearly coincides with the 22° halo.  1, fiche 5, Anglais, - lower%20tangent%20arc

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 CONT

Un peu au-dessus ou au-dessous de l'astre lumineux [soleil], à la distance de 22 degrés, on peut fréquemment voir des arcs supérieurs et inférieurs tangents au petit anneau.  2, fiche 5, Français, - arc%20tangent%20inf%C3%A9rieur

Fiche 5,  Justifications,  Espagnol

Fiche 6,  Justifications,  Anglais

Record number: 6, Textual support number: 1 DEF

An arc of light tangent to a halo. It forms by refraction of light through ice crystals.  2, fiche 6, Anglais, - tangent%20arc

Record number: 6, Textual support number: 1 CONT

A tangent arc is a patch of bright light that is occasionally observed along a halo. This occurs when sunlight is refracted by falling hexagonal "pencil-shaped" ice crystals whose long axes are oriented horizontally.  3, fiche 6, Anglais, - tangent%20arc

Record number: 6, Textual support number: 2 CONT

tangent arcs. ... The most common of these are the upper and lower tangent arcs to the halo of 22°. They form separate arcs when the sun is low, but as the sun climbs they join to produce the circumscribed halo. These arcs are explained by refraction through the 60° prism sides of columnar crystals oriented with their long axes horizontal.  4, fiche 6, Anglais, - tangent%20arc

Record number: 6, Textual support number: 1 PHR

tangent arc to 22° halo, to 46° halo.  5, fiche 6, Anglais, - tangent%20arc

Record number: 6, Textual support number: 2 PHR

22° upper, 22° lower, lower, upper tangent arc.  5, fiche 6, Anglais, - tangent%20arc

Fiche 6,  Justifications,  Français

Record number: 6, Textual support number: 1 CONT

On répertorie également dans les halos de nombreux phénomènes optiques plus rares. [...] Les arcs tangents sont de courts arcs lumineux partant soit de la base ou du sommet du petit halo, soit (en un couple symétrique) de la demi-circonférence inférieure du grand halo.  1, fiche 6, Français, - arc%20tangent

Record number: 6, Textual support number: 1 PHR

Arc tangent au halo de 22°, au halo de 46°; inférieur, supérieur.  2, fiche 6, Français, - arc%20tangent

Fiche 6,  Justifications,  Espagnol

Record number: 6, Textual support number: 1 PHR

Arco tangente al halo de 22°, al halo de 46°, superior.  1, fiche 6, Espagnol, - arco%20tangente