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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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(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]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


nRaster m or nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in periodicals archive ?
The output watershed raster is used with the ArcMap Raster Clip tool to clip the elevation, flow length, and land cover rasters to the extent relevant to a culvert.
The tool is compatible with different DEM resolutions, but finer resolution rasters will result in more accurate watershed delineation.
Those factors have been presented in the form of continuous data (rasters, pixel size 10 x10 m).
Overlay can be realized with the use of various logical operations, in the case of logical sum "OR" that made sure the highest value from the overlaying rasters was written into the resulting pixel; in most cases it was value "1" representing basically impassable terrain (see Figures 1 and 2 in detail).
Additional mound characteristics were extracted from the 3D rasters with 3D Analyst and Spatial Statistics tools in ArcGIS.
Rasters and reception, broadcast and projection, phenomenology and opticality: Theories about this art have been at once raw and pretentious, much like the medium itself.
A small sample-handling SPM (one that rasters the sample) has too small a working area to get enough coolant around the heating element and, even though the heater might be capable of 250 to 300 [degrees] C, the SPM becomes unstable and unusable at less than 100 [degrees] C.
And the same multitude, no doubt, is hearing the siren call of Hollywood beseeching all of our best and brightest hackers and rasters to create bigger and wilder special effects for upcoming multimillion-dollar-budgeted blockbusters.
Although the subjective scaling method confirmed the asymmetry in sensitivity to rasters scanned T-B compared with those scanned B-T, L-R, and R-L, we wished to quantify the effect using more rigorous psychophysical procedures.
The most common use of the DSP 200 is on-the-fly goniometric raster measurements.
The requisite files were downloaded as ASCII files and converted to raster files in ESRI ArcMap 9.2, using the "Conversion Tools" function within "ArcToolbox"; the raster files were then stitched together using the "Mosaic" function.