D defs.my
Entry 1 sense Webster, 1913

Opisthography

· Op·is·thog·ra·phy · IPA
01 n. A writing upon the back of anything, as upon the back of a leaf or sheet already written upon on one side.
  1. 1.
    A writing upon the back of anything, as upon the back of a leaf or sheet already written upon on one side.[R.]