[an-tee-hey-ley-shuh n, -ha-, an-tahy-]Photography
  1. the process of treating a film base with a light-absorbing substance to prevent refraction of light from the rear of the film.
  1. resistant to halation.

Origin of antihalation

First recorded in 1900–05; anti- + halation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for antihalation


  1. photog
    1. a process by which light, passing through the emulsion on a film or plate, is not reflected back into it but is absorbed by a layer of dye or pigment, usually on the back of the film, thus preventing halation
    2. (as modifier)antihalation backing
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