photonegative

[ foh-tuh-neg-uh-tiv ]

adjective

, Physics.

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

photonegative

/ ˌfəʊtəʊˈnɛɡətɪv /

adjective

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

Word History and Origins

Origin of photonegative¹

First recorded in 1910–15; photo- + negative