White balance
Definition
White balance refers to the adjustment of the color temperature[*] of an image in order to achieve a white display of objects that are usually percieved as white
Usage
If images for a panorama are shot at different white balance the stitching[*] software must correct for this fact in order to produce a seamless panorama. Usually this is combined with exposure correction and vignetting correction.
See also
wikipedia:white balance[*]