Dictionary.com
definitions
  • synonyms

shadow mask

See more synonyms on Thesaurus.com
noun Television.
  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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for aperture mask

Historical Examples

  • 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 aperture mask

shadow mask

noun
  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

  • About
  • Cookies, Terms, & Privacy
© 2018 Dictionary.com, LLC.