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A scanning pattern of parallel lines that form the image projected on a cathode-ray tube of a television set or display screen.

[German, from Latin rāstrum, rake (from the resemblance of the parallel lines to a rake's path); see rēd- in Indo-European roots.]


1. (Electronics) a pattern of horizontal scanning lines traced by an electron beam, esp on a television screen
2. (Broadcasting) a pattern of horizontal scanning lines traced by an electron beam, esp on a television screen
(Computer Science) to use web-based technology to turn (a digital image) into a large picture composed of a grid of black and white dots
[C20: via German from Latin: rake, from rādere to scrape]


(ˈræs tər)

1. a pattern of scanning lines covering the area on which an image is projected on the cathode-ray tube of a TV set.
2. Computers. a set of horizontal lines composed of individual pixels, forming an image on a monitor.
[1934; < German: screen, network < Latin rāstrum toothed hoe, rake]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.raster - the rectangular formation of parallel scanning lines that guide the electron beam on a television screen or a computer monitor
video display, display - an electronic device that represents information in visual form
formation - a particular spatial arrangement
pel, picture element, pixel - (computer science) the smallest discrete component of an image or picture on a CRT screen (usually a colored dot); "the greater the number of pixels per inch the greater the resolution"
References in periodicals archive ?
is being awarded a $6,000,000 firm-fixed-price, indefinite-delivery/indefinite-quantity delivery order contract for the manufacture of stroke and raster display monitors for Consolidated Automated Support System stations for the U.
Intergraph's family of I/RAS products includes I/RAS C for MicroStation image-processing and I/RAS B for binary raster display and editing.
incorporate high-resolution, color raster display technology