This term has to do with artificial lighting. Sunlight has a different color temperature than does a regular light bulb. Florescent lights have yet a different color temperature. This is why photographs taken indoors with out door film look orange. Because the color temperature from regular incandescent light bulbs is redder than is that generated by the sun.
Florescent lights are more green as a rule.
Computer monitors also have a color temperature. Humans don't notice this much because they are used to it and they correct for this automatically. Machines, on the other hand, do not. Photographers who must use outdoor film indoors, employ a series of filters to compensate for the color temperature of the indoor lighting. They may use various intensities of blue filters on their camera lenses to correct for this difference and thus, the photos they get back from the photo lab, no longer have the orange tint to them.