arc

1. Something shaped like a curve or arch: the vivid arc of a rainbow.
2. Mathematics. A segment of a circle.
3. An electric arc.
4. Astronomy. The apparent path of a celestial body as it rises above and falls below the horizon.

1. To form an arc.
2. To move or seem to move in a curved path: the stars that arc across the sky.

[Middle English ark, from Old French arc, from Latin arcus.]

verb

To swerve from a straight line: angle, arch, bend, bow, crook, curve, round, turn. See straight/bent.

Definition: curve
Antonyms: straight line

The abbreviation for AIDS-related complex. See also acquired immunodeficiency syndrome.

1. The luminous column of gas in an arc discharge; caused by the flow of electric current between separated electrodes in a gas.
2. See carbon-arc spotlight.
3. Any part of the circumference of a circle.
4. An angular measure.

A part of the circumference of a circle, or a regularly curved line.

• binauricular a. — the arc across the top of the head from one auricular point to the other.
• reflex a. — the circuit traveled by impulses producing a reflex action: from the receptor organ, through the afferent nerve, nerve center, efferent nerve, to the effector organ.

Discharge of electricity through a gas such as lightning discharging through the atmosphere.

Tutor's tip: An "ark" (similar to Noah's boat) can make an "arc" (segment of a circle) in the water, but not an "arch" (curved structure over an open space) over the water.

This article is about "Arc" as a word. For initialisms, see ARC.

Look up Arc in Wiktionary, the free dictionary.

Contents 1 Mathematics 2 Optics 3 Engineering 4 Geography 5 Biology 6 Modern culture 7 Computing and gaming 8 Other 9 See also

Arc may refer to:

Mathematics

• Arc (geometry), a segment of a differentiable curve
• Arc (projective geometry), a particular type of set of points of a projective plane
• Arcminute, a measure used for angles, equal to 1/60th of a degree
• "arc-", a prefix sometimes used for an inverse function, specifically trigonometry functions
• A directed edge in graph theory

Optics

• 120° parhelion, relatively rare halo, an optical phenomenon occasionally appearing along with very bright sun dogs
• Infralateral arc, a rare halo, an optical phenomenon appearing similar to a rainbow under a white parhelic circle
• Lower tangent arc, rarely observable halo, an optical phenomenon appearing under and tangent to a 22° halo centred around the sun
• Parry arc, a rare halo, an optical phenomenon which occasionally appears over a 22° halo together with an upper tangent arc
• Subhelic arc, a rare halo that curves upwards from the horizon and touches the tricker arc above the anthelic point
• Supralateral arc, a rare halo, an optical phenomenon often confused with the indeed infrequently appearing 46° halo
• Upper tangent arc, halo, an atmospheric optical phenomenon which appears over and tangent to the 22° halo centred around the sun

Engineering

• Arc chute, a protective device in an electrical circuit breaker
• Arc lamp, a device that produces light by an electric arc
• Arc welding, a method of welding that uses an electric arc to melt the metals together
• Electric arc or voltaic arc, an ongoing plasma discharge (an electric current through a gas), producing light and heat
• Arc or arch, a bowed or curved structure capable of spanning a space while supporting significant weight

Geography

• Arc (Savoie), a river of eastern France, tributary of the Isère river
• Arc (Provence), a river of southern France, flowing into the Étang de Berre
• Les Arcs, a ski resort in the French Alps
• Volcanic arc or island arc, a chain of volcanic mountains or islands formed by plate tectonics

Biology

• Arc (protein), a name of product of an immediate early gene, also called Arg3.1

Modern culture

• Story arc, an extended or continuing storyline
• Character arc, the status of a character as it unfolds throughout the story
• "Arc" (song), a song by Pearl Jam
• Arc (album), a live album by Neil Young

Computing and gaming

• Arc (programming language), a Lisp dialect in development by Paul Graham
• .arc, a file extension for archive files
• arc, the command-line interface for ArcInfo
• Arc System Works, a video game developer

Other

• Accelerating Rate Calorimeter, a type of Adiabatic Calorimeter
• Aramaic language (ISO 639-2/3 language code), a Semitic language
• Arc @ UNSW, the principal student organisation at the University of New South Wales
• Arc of the United States, a charitable organization
• Joan of Arc
• Prix de l'Arc de Triomphe, a Group 1 flat horse race
• The Arc (Bahá'í), a number of administrative buildings for the Bahá'í Faith, located on Mount Carmel in Israel

See also

• Ark
• Arch
• ARCS

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

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Dansk (Danish)
n. - bue, lysbue
v. intr. - danne bue, danne lysbue

1.
n. - det jordvidenskabelige forskningsråd

2.
abbr. - ARC, Amerikansk røde kors

Nederlands (Dutch)
(cirkel)boog, vonk, een boog vormen, Aids-gerelateerd complex, Amerikaans Rode Kruis, raad voor de ontwikkeling van landbouw,

Français (French)
n. - (Géom) arc, (Élec) arc, (Astron) arc, en arc
v. intr. - décrire un arc de cercle, (Élec) former un arc (électrique)

abbr. - syndromes associés au SIDA, Croix-rouge américaine

Deutsch (German)
n. - Landwirtschaftlicher Forschungsrat, Bogen, (electr.) Lichtbogen
v. - einen Bogen bilden

1.
n. - (Pol) Regenbogen Fraktion

2.
abbr. - Landwirtschaftlicher Forschungsrat, (Abk) Prä-Aids-Symtomatik

Ελληνική (Greek)
abbr. - σύνδρομο συναφές με το 'Ειτζ
n. - (μαθημ., ηλεκτρ.) τόξο
v. - διαγράφω τόξο, (ηλεκτρ.) "γεφυρώνω" με βολταϊκό (τόξο)
adj. - τοξωτός

Italiano (Italian)
croce rossa americana, ente di ricerca per l'agricoltura, arco, formare un arco, ad arco

Português (Portuguese)
n. - arco (m) (Geom.) (Astron.), arco (m) voltaico (Eletr.)
v. - formar um arco, formar um arco voltaico (Eletr.)
abbr. - Cruz (f) Vermelha Americana, controle (m) remoto automático (Téc.), célula (f) reativa a antígenos (Biol.)

Русский (Russian)
Американский Красный Крест, Совет по Исследованию сельского хозяйства, арка, свод, образовывать дугу, имеющий форму арки

Español (Spanish)
n. - arco, en forma de arco
v. intr. - formar un arco, arquearse, doblarse

1.
n. - complejo relacionado al SIDA

2.
abbr. - Cruz Roja Norteamericana, complejo relacionado al SIDA

Svenska (Swedish)
abbr. - lantbruksforskningsråd
n. - båge, cirkelbåge, ljusbåge
v. - bilda båge
adj. - båg-

中文（简体）(Chinese (Simplified))
1. 农业研究委员会, 美国红十字会

2. 农业研究委员会, 美国红十字会

弧, 弓形, 弧形, 呈弧形, 循弧线行进, 形成电弧

中文（繁體）(Chinese (Traditional))
1.
n. - 農業研究委員會, 美國紅十字會

2.
abbr. - 農業研究委員會, 美國紅十字會

n. - 弧, 弓形, 弧形
v. intr. - 呈弧形, 循弧線行進, 形成電弧

한국어 (Korean)
n. - 원호, 아크, 궁형
v. intr. - 전호를 이루다

1.
n. - 미국 적십자사, 에이즈 관련 기구

2.
abbr. - 에이즈 관련 기구, 미국 적십자사 (American Red Cross)

日本語 (Japanese)
n. - 弧, 弧形, アーク
v. - 弧状に動く, アークをなす
adj. - 弧の

العربيه (Arabic)
‏(اختصار) قوس, (الاسم) قهس (فعل) قوسي (صفه) جز من دائره أو خط منحني, كل ما هو قوسي الشكل‏

עברית (Hebrew)
n. - ‮קשת, חלק ממעגל‬
v. intr. - ‮היווה קשת‬
n. - ‮מועצת המחקר החקלאי (בריטניה)‬
abbr. - ‮סיבוך הקשור באיידס, הצלב האדום האמריקאי‬

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