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photodecomposition

American  
[foh-toh-dee-kom-puh-zish-uhn] / ˌfoʊ toʊˌdi kɒm pəˈzɪʃ ən /

noun

Chemistry.
  1. the breaking down of molecules by radiant energy.


Etymology

Origin of photodecomposition

First recorded in 1885–90; photo- + decomposition