carbon arc

noun

an electric arc between two carbon electrodes, used mainly for lighting, as in an arc light for a motion-picture projector, or for intense heating, as in the cutting and welding of metals.

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Origin:
1905–10

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins

World English Dictionary

carbon arc

—n
1.	a. an electric arc produced between two carbon electrodes, formerly used as a light source
	b. (as modifier): carbon-arc light
2.	a. an electric arc produced between a carbon electrode and material to be welded
	b. (as modifier): carbon-arc welding

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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