boustrophedon

boustrophedon n.  [from a Greek word for turning like an ox
   while plowing] An ancient method of writing using alternate
   left-to-right and right-to-left lines.  This term is actually
   philologists' techspeak and typesetters' jargon.  Erudite hackers
   use it for an optimization performed by some computer typesetting
   software and moving-head printers.  The adverbial form
   `boustrophedonically' is also found (hackers purely love
   constructions like this).