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raster

[ras-ter]
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.
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Origin of raster

1950–55; < German < Latin rāstrum toothed hoe, rake, derivative of rādere to scratch, scrape
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for raster

raster

noun
  1. a pattern of horizontal scanning lines traced by an electron beam, esp on a television screen
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verb
  1. to use web-based technology to turn a digital image into a large picture composed of a grid of black and white dots
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Word Origin

C20: via German from Latin: rake, from rādere to scrape
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for raster

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.

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Online Etymology Dictionary, © 2010 Douglas Harper