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photoisomerization

American  
[foh-toh-ahy-som-er-uh-zey-shuhn] / ˌfoʊ toʊ aɪˌsɒm ər əˈzeɪ ʃən /

noun

Chemistry.
  1. isomerization induced by light.


Etymology

Origin of photoisomerization

1925–30; photo- + isomerization ( def. )