Illustrated Companion to the Latin Dictionary/Opisthographus

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

OPISTHO'GRAPHUS (ὀπιστθόγραφος). Written on both sides of the paper, or backed, as it is technically called by our compositors; a practice not habitual to the ancients, but adopted sometimes for economy, especially in the case of foul copies which were intended to be written out fair afterwards. Plin. Ep. iii. 5. 17.