The Collaborative International Dictionary
Prefulgency
Prefulgency \Pre*ful"gen*cy\, n. [L. praefulgens, p. pr. of
praefulgere to shine forth. See Pre-, and Fulgent.]
Superior brightness or effulgency. [R.]
--Barrow.
Wiktionary
prefulgency
n. (context obsolete English) superior brightness or effulgency