To be fair, though, a lot of SF and fantasy has specialist terminology which makes no fucking sense unless you read the work.I had an evanescent flow stream, but my urologist fixed it.
One of the funniest moments in Cherryh's Faded Sun trilogy is when a human soldier puts on a blue robe.
End of Eternity is about an attack on Eternity from the Dead Zone.
Foundation is about a society destined by psychohistory to overthrow Trantor.
I haven't read Scalzi; I don't read a lot of fiction. But he has a reasonably good reputation and unless corrected, I'm happy to assume "Evanescent Flow" actually means something.