Definitions for "Dark current"
Electrons released in a detector (often a CCD) by the action of the thermal energy of the body of the detector.
An omnipresent signal in a CCD that is caused by the thermal energy of the electrons being able to break away from the CCD structure and become free to move through the silicon in just the same way as electrons generated in the CCD by incident light photons.
Continuous current flowing through rods and cones in the retina. In the dark, the membrane potential is low (-30 mV); in light, membrane resistance increases, so current declines.