A rectangular pattern of lines; on a video display, the horizontal scan lines from which the term raster scan is derived.
The set of horizontal lines composed of pixels, used to form an image on a crt screen.
Scan pattern (as of the electron beam in a cathode-ray tube) in which an area is scanned from side to side in lines from top to bottom; also; a pattern of closely spaced rows of dots that form an image (as on the cathode-ray tube of a television or computer display)