9 Grammatical Pitfalls


[ahrk] /ɑrk/
Geometry. any unbroken part of the circumference of a circle or other curved line.
Also called electric arc. Electricity. a luminous bridge formed in a gap between two electrodes.
Compare spark1 (def 2).
Astronomy. the part of a circle representing the apparent course of a heavenly body.
anything bow-shaped.
verb (used without object), arced
[ahrkt] /ɑrkt/ (Show IPA)
or arcked, arcing
[ahr-king] /ˈɑr kɪŋ/ (Show IPA)
or arcking.
to form an electric arc.
to move in a curve suggestive of an arc.
Origin of arc
1350-1400; Middle English ark < Latin arcus bow, arch, curve
Can be confused
arc, ark. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for arcing
  • Suddenly opening such a circuit releases stored electromagnetic energy concentrating at a point, producing catastrophic arcing.
  • Its blade caught the torchlight and scrawled an arcing rune of fire in the gloom.
  • The sun seems to come alive with arcing loops that show magnetic field lines interacting above its surface.
  • In this three-hour exposure during a full moon, the two brightest stars in the sky are described as arcing lines.
  • It consists of one upward-arcing phrase lasting ten bars and around thirty seconds.
  • Steep mountains press in on either side of the village, and arcing through its western flank is a splendid little stream.
  • When the dolphins finally show themselves, they swim close to the boat, arcing through the air and playing to their audience.
  • But what this picture so spectacular are the graceful blue-gray swirls arcing across the dunes.
  • But all such devices can only hold so much charge, beyond which arcing occurs between the electrodes, wasting the stored power.
  • But he has slimmed down and has been more active this season, sinking his high-arcing, pick-and-pop jumper with uncanny frequency.
British Dictionary definitions for arcing


something curved in shape
part of an unbroken curved line
a luminous discharge that occurs when an electric current flows between two electrodes or any other two surfaces separated by a small gap and a high potential difference
(astronomy) a circular section of the apparent path of a celestial body
(maths) a section of a curve, graph, or geometric figure
verb arcs, arcing, arced, arcs, arcking, arcked
(intransitive) to form an arc
(maths) specifying an inverse trigonometric function: usually written arcsin, arctan, arcsec, etc, or sometimes sin–1, tan–1, sec–1, etc
Word Origin
C14: from Old French, from Latin arcus bow, arch


AIDS-related complex: an early condition in which a person infected with the AIDS virus may suffer from such mild symptoms as loss of weight, fever, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for arcing



late 14c., originally in reference to the sun's apparent motion in the sky, from Old French arc "bow, arch, vault" (12c.), from Latin arcus "a bow, arch," from PIE root *arku- "bowed, curved" (cf. Gothic arhvazna "arrow," Old English earh, Old Norse ör; also, via notion of "supple, flexible," Greek arkeuthos, Latvian ercis "juniper," Russian rakita, Czech rokyta, Serbo-Croatian rakita "brittle willow"). Electrical sense is from 1821.


1893, in the electrical sense, from arc (n.). Meaning "to move in an arc" attested by 1954. Related: Arced; arcing.

Online Etymology Dictionary, © 2010 Douglas Harper
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arcing in Medicine

arc (ärk)
A curved line or segment of a circle.

ARC abbr.
AIDS-related complex

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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arcing in Science
  1. A segment of a circle.

  2. See electric arc.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Related Abbreviations for arcing




  1. Addiction Research Center
  2. advance readers copy
  3. AIDS-related complex
  4. amateur radio club
  5. American Red Cross
  6. [National Aeronautics and Space Administration] Ames Research Center
  7. Appalachian Regional Commission
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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