opisthograph

[ uh-pis-thuh-graf, -grahf ]
/ əˈpɪs θəˌgræf, -ˌgrɑf /

noun

a manuscript, parchment, or book having writing on both sides of the leaves.
Compare anopisthograph.

Origin of opisthograph

1615–25; < Latin opisthographus < Greek opisthógraphos; see opistho-, -graph