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direct current

Electricity. an electric current of constant direction, having a magnitude that does not vary or varies only slightly.
Abbreviation: dc.
Origin of direct current
First recorded in 1885-90
Related forms
direct-current, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for direct current

direct current

a continuous electric current that flows in one direction only, without substantial variation in magnitude DC Compare alternating current
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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direct current in Science
direct current
An electric current that moves in one direction with constant strength. Batteries are a source of direct current. Direct current is not used for long-distance power transmission because it is difficult to step up the voltage to a level that is efficient for energy transfer and then to step the voltage back down again for safe domestic use. Compare alternating current. See Notes at current, Tesla.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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direct current in Culture
direct current (DC)

The electric current in which the electrons flow in one direction only. (Compare alternating current (AC).)

Note: DC is usually supplied by batteries.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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