I shud say that I knew it - in order to be called beauty with brains - but I actually found it on www.wordsmith.org
Fri 6 Dec, 2002 07:22 am
I don't doubt it is in fact an English word, but it certainly is damn obscure. I tried the OneLook thing -- 2 sites listed "aerious" -- neither, however, are actual published dictionaries. There weren't any sites that listed the alternative spelling "aereous."