antihalation

[ an-tee-hey-ley-shuh n, -ha-, an-tahy- ]
/ ˌæn ti heɪˈleɪ ʃən, -hæ-, ˌæn taɪ- /
Photography

noun

the process of treating a film base with a light-absorbing substance to prevent refraction of light from the rear of the film.

adjective

resistant to halation.

Origin of antihalation

First recorded in 1900–05; anti- + halation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for antihalation

antihalation

/ (ˌæntɪhəˈleɪʃən) /

noun

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