From Longman Dictionary of Contemporary Englishdirect currentdiˌrect ˈcurrent noun [uncountable] HPETEE (abbreviation DC) a flow of electricity that moves in one direction only → alternating current
Examples from the Corpus
direct current• It was Edison who designed and introduced the electrical distribution system for incandescent lighting by direct current.• In his teens he had begun to fiddle with the concept of a substitute for direct current. 