Noun
an electric current that flows in one direction steadily
Source: WordNetIt means the third rail has seven hundred volts of direct current running through it. Touch it and you're human popcorn. James Patterson
A constant direct current has a zero rate-of-change, and sees an inductor as a short-circuit (it is typically made from a material with a low resistivity ). Source: Internet
A high voltage direct current on the inner conductor powered repeaters (two-way amplifiers placed at intervals along the cable). Source: Internet
A pulsating direct current may change in value, i.e., be always present but at different levels, or it may be interrupted completely. Source: Internet
A power supply supplies a direct current to the anode, oxidizing the metal atoms that it comprises and allowing them to dissolve in the solution. Source: Internet
A power supply using a transformer with several windings, one or more rectifiers (which may themselves be vacuum tubes), and large filter capacitors provided the required direct current voltages from the alternating current source. Source: Internet