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photodissociation

[foh-toh-di-soh-see-ey-shuh n, -shee-] /ˌfoʊ toʊ dɪˌsoʊ siˈeɪ ʃən, -ʃi-/
noun
1.
the dissociation or breakdown of a chemical compound by radiant energy.
Origin
1920-1925
1920-25; photo- + dissociation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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