photochromy

[ foh-tuh-kroh-mee ]
/ ˈfoʊ təˌkroʊ mi /

noun

a former technique of color photography.

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Origin of photochromy

First recorded in 1885–90; photo- + -chrome + -y3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020