photopositive

[ foh-tuh-poz-i-tiv ]
/ ˌfoʊ təˈpɒz ɪ tɪv /

adjective Physics.

pertaining to a substance whose conductivity increases upon absorption of electromagnetic radiation.

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Origin of photopositive

First recorded in 1910–15; photo- + positive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for photopositive

photopositive
/ (ˌfəʊtəʊˈpɒzɪtɪv) /

adjective

physics (of a material) having an electrical conductivity that increases 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