Definition of "arc lamp" []

• An electric light in which a current traverses a gas between two incandescent electrodes and generates an arc that produces light. Also called arc light. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.