Lewis & Short

† diptycha, ōrum, n., = δίπτυχα.

  1. I. A writing-tablet of two leaves (late Lat.), Cod. Theod. 15, 9, 1; Symm. Ep. 2, 80 al.
  2. II. The double shell of the oyster, Ambros. Hexaem. 5, 8.