photochromic - WordReference.com Dictionary of English

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photochromic

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Concise Oxford English Dictionary © 2008 Oxford University Press:
photochromic/fəʊtə(ʊ)ˈkrəʊmɪk/

▶adjective undergoing a reversible change in colour when exposed to light of a particular frequency or intensity.

– derivatives
photochromism noun.

– origin 1950s: from photo- + Gk khrōma ‘colour’ + -ic.

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