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photonegative

[foh-tuh-neg-uh-tiv] /ˌfoʊ təˈnɛg ə tɪv/
adjective, Physics.
1.
pertaining to a substance, as selenium, having a conductivity that decreases upon absorption of electromagnetic radiation.
Origin of photonegative
1910-1915
First recorded in 1910-15; photo- + negative
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for photonegative

photonegative

/ˌfəʊtəʊˈnɛɡətɪv/
adjective
1.
(physics) (of a material) having an electrical conductivity that decreases with increasing illumination
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
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