You searched for: “arc
arc
A portion of the circumference of a circle that is represented as a curved line.
This entry is located in the following unit: Measurements and Mathematics Terms (page 2)
(a radiographic technique that produces an image of a detailed cross section of bodily tissue using a narrow collimated beam of x-rays that rotates in a full arc around a patient to image the body in cross-sectional slices)
Word Entries containing the term: “arc
arc minute, arc second
Units for measuring small angles, used in astronomy.

An arc minute (symbol ') is one-sixtieth of a degree, and an arc second (symbol ") is one-sixtieth of an arc minute. Small distances in the sky, as between two close stars or the apparent width of a planet's disk, are expressed in minutes and seconds of arc.

This entry is located in the following unit: Astronomy and related astronomical terms (page 3)
Word Entries at Word Info: “arc
arc (AHRK)
A curved line, arch, crescent, bow: "The rainbow formed a beautiful arc in the sky."

Both arc and arch come from the Latin element arcus, "bow". Archery and archer also come from this same Latin element.

This entry is located in the following unit: arc, arc-, arci-, arch, arch- (page 1)
arc, ark
arc (AHRK) (noun)
A curved line, arch, crescent, bow: The rainbow formed a beautiful arc in the sky.

Both arc and "arch" come from the Latin element arcus, "bow". Archery and archer also come from this same Latin element.

ark (AHRK) (noun)
1. The chest containing the Ten Commandments of God, written on stone tablets and carried by the Hebrews during their long desert wanderings: As they wandered the desert, the Hebrews carried the Ark with them because it contained their sacred documents.
2. The boat mentioned in the Bible which God commanded Noah to build for shelter during the Great Flood: Noah was commanded to build an ark, big enough for two of each species of animals, in anticipation of the flood.
3. A large, flat-bottomed or awkward boat: They lived on an ark, or house boat, on the Seine River in Paris.

When Wilbur decided to move off the isolated island, he determined to build an ark to carry his possessions. The builder designed the ark using a long arc shaped bow.

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A unit at Word Info related to: “arc
(Latin: arcus, bow, a curved structure)
Word Entries at Word Info containing the term: “arc
alpha arc
A reference to the sequence of a stimulus leading to motor behavior via a simple sensorimotor path.

Beta arc refers to arousal of higher cortical paths by the functioning of an alpha arc; thus, leading to a "sensation" rather than simple "awareness", and not by an outside stimulus directly.

The term alpha arc is approximately equivalent to immediate response in Watson's behavioristic psychology, while the term beta arc is roughly equivalent to Watson's delayed response or implicit behavior.

This entry is located in the following unit: alpha; A, α + (page 1)
arc lamp
An electric light in which a current produces light when an arc traverses the gap between two incandescent electrodes in a container filled with a gas; such as, xenon.

Arc lamps are used to produce intense light; such as, in spotlights and to produce heat for welding.

This entry is located in the following unit: arc, arc-, arci-, arch, arch- (page 1)
contiguous arc (s) (noun); contiguous arcs (pl)
Crater arcs that are in contact with each other.
This entry is located in the following unit: tang-, tact-, tast-, ting-, -tig -tag, -teg- (page 2)
electric arc
1. A discharge of electricity through a gas, normally characterized by a voltage drop approximately equal to the ionization potential of the gas.
2. A luminous discharge of current that is formed when a strong current jumps a gap in a circuit or between two electrodes.

Electric arcs across specially designed electrodes can produce very high heat and bright light, and are used for such purposes as welding and illumination in spotlights.

Unwanted arcs in electrical circuits can cause fires and lightning is an example of an electric arc between one cloud and the earth or another cloud, as are sparks caused by discharges of static electricity.

This entry is located in the following unit: electro-, electr-, electri- (page 5)
electric arc furnace, electric-arc furnace, arc furnace
1. A type of electric furnace in which heat is generated by an arc between carbon electrodes above the surface of the material, commonly a metal, which is being heated.
2. A furnace used to heat materials with the energy from an electric arc.
3. An electric furnace in which an electric arc provides the source of heat for making steel.
4. A steel-making apparatus which uses high-quality scrap or ore with the polluting elements eliminated.
This entry is located in the following unit: electro-, electr-, electri- (page 5)
electric arc heating, electric-arc heating, arc heating
1. The heating of a material by the heat energy from an electric arc, which has a very high temperature and very high concentration of heat energy.
2. The heating of matter by an electric arc.

The material may be solid, liquid, or gaseous and when the heating is direct, the material to be heated is one electrode; but for indirect heating, the heat is transferred from the arc by conduction, convection, or radiation.

This entry is located in the following unit: electro-, electr-, electri- (page 5)
electric arc lamp, electric-arc lamp, arc lamp
1. An electric lamp in which the light is produced by an arc made when current flows through ionized gas between two electrodes.
2. A general term for a class of lamps which produce light by an electric arc or a voltaic arc.

The lamp consists of two electrodes, typically made of tungsten, that are separated by a gas.

This entry is located in the following unit: electro-, electr-, electri- (page 5)
electric arc spraying, electric-arc spraying
A thermal spraying process with an electric arc as a heat source and with compressed gas to propel the material.
This entry is located in the following unit: electro-, electr-, electri- (page 5)
electric-arc welding, electric arc welding
1. A welding process which uses an electric arc as the source of heat.
2. Welding in which the joint is heated to fusion by an electric arc or by a large electric current.
3. The joining of metal components by fusing them with heat from an electrical arc struck between two electrodes.
This entry is located in the following unit: electro-, electr-, electri- (page 22)
ionization arc-over
1. Arcing across terminals or contacts due to ionization of the adjacent air or gas.
2. Arcing across satellite antenna terminals as the satellite passes through the ionized regions of the ionosphere.
3. An electric spark which is created when ionized charges build up in a medium and produce forces on the electrons.