Source : Webster's Revised Unabridged Dictionary (1913)

Boustrophedon \Bou`stro*phe"don\, n. [Gr. ? turning like oxen in
   plowing; ? to turn.]
   An ancient mode of writing, in alternate directions, one line
   from left to right, and the next from right to left (as
   fields are plowed), as in early Greek and Hittite.

Source : WordNet®

boustrophedon
     n : an ancient writing system: having alternate lines written in
         opposite directions; literally `as the ox ploughs'