The term DOT ON A SCREEN can be broken down into two crossword solutions: BLIP (4 letters) and PIXEL (5 letters). A BLIP is a small, bright spot on a computer screen that appears for a short time. It is usually caused by a malfunction or an error in the system. A PIXEL is a single point in a digital image or display. It is the smallest element of an image that can be individually processed in a video display system.