Etymology
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effulgence (n.)

1660s (Milton), from Late Latin effulgentia, from Latin effulgentem (nominative effulgens), present participle of effulgere "to shine out, gleam forth," from assimilated form of ex "out" (see ex-) + fulgere (from PIE *bhleg- "to shine, flash," from root *bhel- (1) "to shine, flash, burn").

updated on October 14, 2017

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Definitions of effulgence from WordNet

effulgence (n.)
the quality of being bright and sending out rays of light;
Synonyms: radiance / radiancy / shine / refulgence / refulgency
From wordnet.princeton.edu, not affiliated with etymonline.