A light-induced bond cleavage. The term is often used incorrectly to describe irradiation of a sample.
The term "photolysis" was found in the following pages:
Natural dissolved organic matter plays dual role in cycling of mercury | EVISA's News
Instrument database: Kore Technology - Mini TOF-MS
Link database: EPA: Surface Water Models to Assess Exposures
Instrument database: Metrohm AG - 705 UV Digester