[ foh-tuh-neg-uh-tiv ]
/ ˌfoʊ təˈnɛg ə tɪv /

adjective Physics.

pertaining to a substance, as selenium, having a conductivity that decreases upon absorption of electromagnetic radiation.


How Hip Is Your Lingo? Take Our Slang Quiz!
If you aren’t already skilled in slang, then this quiz can get you up to speed in no time!
Question 1 of 11
OK Boomer can be perceived as pejorative, but it is mostly considered to be _____

Origin of photonegative

First recorded in 1910–15; photo- + negative Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for photonegative

/ (ˌfəʊtəʊˈnɛɡətɪv) /


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