solarization

noun
so·​lar·​i·​za·​tion | \ ˌsō-lə-rə-ˈzā-shən How to pronounce solarization (audio) \

Definition of solarization

1 : a reversal of gradation in a photographic image obtained by intense or continued exposure
2 : an act or process of solarizing

First Known Use of solarization

1853, in the meaning defined at sense 1

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