shadow mask

  1. a perforated metal plate situated behind the faceplate of a color television picture tube and having holes aligned to insure that each of three electron beams strikes only its corresponding red, green, or blue phosphor dot.

Origin of shadow mask

First recorded in 1950–55
  • Also called aperture mask.

Words Nearby shadow mask Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use shadow mask in a sentence

  • From the eyeless sockets of the shadow-mask a phosphorescent gleam shot towards the Grand Chamberlain.

    Under the Witches' Moon | Nathan Gallizier

British Dictionary definitions for shadow mask

shadow mask

  1. television a perforated metal sheet mounted close to the phosphor-dotted screen in some colour television tubes. The holes are positioned so that each of the three electron beams strikes the correct phosphor dot producing the required colour mixture in the image

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