direct current

Electricity. an electric current of constant direction, having a magnitude that does not vary or varies only slightly. Abbreviation: dc


direct-current, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
direct current
Compare alternating current DC a continuous electric current that flows in one direction only, without substantial variation in magnitude

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
direct current  [%PREMIUM_LINK%]     (dĭ-rěkt')  Pronunciation Key 
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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American Heritage
Cultural Dictionary
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 American Heritage® 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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Example sentences
Normally a computer's power supply converts alternating current to clean direct
And factor in the effect of high voltage direct current transmission.
So the future is locally produced direct current solar energy.
The usual way to do this would be to use a rectifier-a device that converts
  alternating to direct current.
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