If you watched Buffy the Vampire Slayer all the way through and loved Spike as much as me, chances are you'll remember "effulgent."
I'm pleased to report that I have spotted "effulgent" in the wild, in John Metcalfe's 1925 story "The Smoking Leg," along with a nearly identical word of similar meaning, "refulgent." Best purple prose I've read in a long while. "The Smoking Leg" is secretly hilarious, deliciously critical of the European colonial project and its ultimately self-destructive tendencies. Plus: effulgent.