photochromic

adjective pho·to·chro·mic \ˌfō-tə-ˈkrō-mik\

Definition of PHOTOCHROMIC

: capable of changing color on exposure to radiant energy (as light) <photochromic glass>

: of, relating to, or utilizing the change of color shown by a photochromic substance <a photochromic process>

— pho·to·chro·mism \-ˌmi-zəm\ noun

phot- + chrom- + ¹-ic

First Known Use: 1953

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