re·ful·gence \rə̇ˈfəljən(t)s, rēˈf-\noun alsore·ful·gen·cy\-nsē, -nsi\ (pluralrefulgencesalsorefulgencies) Etymology: Latin refulgentia, from refulgent-, refulgens (present participle of refulgēre) + -ia -y : the quality or state of being refulgent : brilliance, splendor, radiance < came into the refulgence of the headlights — Kay Boyle >