Noun
English Wikipedia has an article on:photodissociationWikipedia
photodissociation (countable and uncountable, plural photodissociations)
(chemistry) the dissociation of a molecule following the absorption of a photon
In photon-dominated regions (PDRs), photodissociation dominates, producing CN (HCN + ν → CN + H). Source: Internet
When exposed to solar radiation, water quickly decomposes through a process known as photodissociation and is lost to space. Source: Internet