direct current

electric current whose direction and value are unchanging

Direct current (DC or "continuous current") is the constant flow of  electric charge. This is typically in a conductor such as a wire, but can also be through semiconductors, insulators, or even through a vacuum as in electron or ion beams. In direct current, the electric charges flow in the same direction, distinguishing it from alternating current (AC). A term formerly used for direct current was Galvanic current.
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Current /cur·rent/ 1. anything that flows. 2. electric c. action current the current generated in the cell membrane of a nerve or muscle by the [more]Direct current - Community and Resources

Noun
1. an electric current that flows in one direction steadily
(synonym) DC
(antonym) alternating current, AC
(hypernym) electricity, electrical energy

electrical current that remains of one polarity.