halation

[ hey-ley-shuh n, ha- ]
/ heɪˈleɪ ʃən, hæ- /

noun Photography.

a blurred effect around the edges of highlight areas in a photographic image caused by reflection and scattering of light through the emulsion from the back surface of the film support or plate.

QUIZZES

HEED THE VOX POPULI, AND TAKE THIS WORD OF THE DAY QUIZ!

Test your memory on these verbal firecrackers from the week of June 29 to July 5!
Question 1 of 7
anchorite

Origin of halation

First recorded in 1855–60; hal(o) + -ation

Words nearby halation

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for halation

British Dictionary definitions for halation

halation
/ (həˈleɪʃən) /

noun

photog fogging usually seen as a bright ring surrounding a source of light: caused by reflection from the back of the film

Word Origin for halation

C19: from halo + -ation
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

Medical definitions for halation

halation
[ hā-lāshən ]

n.

Blurring of the visual image due to glare from strong illumination.
A blurring or spreading of light around bright areas on a photographic image.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.