English is written left-to-right, or LTR in programmerese. Arabic (among others) is written right-to-left, or RTL. And, it turns out, some languages are (or more precisely “had been”) written both RTL and LTR on alternating lines.
There’s a word for that: boustrophedon.
So now I have inflicted YET ANOTHER worthless piece of trivia upon your poor unsuspecting brain. Ha ha. I win.
Tournament Scrabble(tm) players, you already knew this one because it’s supposedly on your list of acceptable words. But you know what isn’t? “Boustrophedonically,” which is a real word but won’t fit within the confines of a Scrabble(tm) board. Neener, neener.