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reversal film

noun Photography.
  1. film developed by the reversal process.
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Origin of reversal film

First recorded in 1930–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for reversal film

reversal film

noun
  1. photographic film that can be processed to produce a positive transparent image for direct projection, rather than a negative for printing
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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