raster

noun

1. Television. a pattern of scanning lines covering the area upon which the image is projected in the cathode-ray tube or liquid-crystal display of a television set or other screen.
2. Digital Technology. a set of horizontal lines composed of individual pixels, used to form an image on a screen or in matrix printing.

noun

1. a pattern of horizontal scanning lines traced by an electron beam, esp on a television screen

verb

2. to use web-based technology to turn a digital image into a large picture composed of a grid of black and white dots

n.

1934 in electrical engineering, from German Raster “screen, frame,” from Latin rastrum “rake,” from rasum, from rodere “to scrape” (see raze). Related: Rasterization; rasterize. From Latin form rastellum comes French râteau “rake,” formerly ratel, originally rastel.