Home › Words › F › fractoluminescencefractoluminescencefractoluminescence · noun — the emission of light from fractured crystals; a form of triboluminescence.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom fracto- + luminescence.nounThe emission of light from fractured crystals; a form of triboluminescence.Definitions & examples from Wiktionary (CC BY-SA 3.0).