bou·stro·phe·don 
(b
′str
ə-f
ēd
n, -f
ēd
ŏn
′)
n. An ancient method of writing in which the lines are inscribed alternately from right to left and from left to right.
[From Greek boustrophēdon, turning like an ox while plowing : bous, ox; see gwou- in the Appendix of Indo-European roots + strophē, a turning (from strephein, to turn; see streb(h)- in the Appendix of Indo-European roots).]
bou·stroph′e·donic (-strŏf′ĭ-dŏnĭk) adj.