I spotted today's word whilst looking up last week's. Perilymph is the liquid inside your ear which sloshes about and makes you dizzy if you spin round really fast. (Come on, I never actually said these posts wold be useful, did I?)
If you'd like to spin round fast without the sloshing part, take a look here.
If you'd like to read about me confessing to a couple of writing mistakes, have a look here.