raster noun. ['rastǝ] M20.
[German = screen, frame from Latin rastrum rake, from ras- pa. ppl stem of radere scrape.]
1. A usu. rectangular pattern of parallel scanning lines as in the display on a cathode-ray tube etc. Also scanning raster. M20.

2. Cinematography & Photography. A fine grid or screen of wires, slits, or lenticular elements, placed in front of the projection screen in some stereoscopic systems. Also raster screen. M20.

■ rastered adjective (of an electron beam) made to scan an area L20.

[TahlilGaran] English Dictionary ▲