parallelopipedon

From New Latin parallelopipedon, alteration of Ancient Greek παραλληλεπίπεδος (parallēlepípedos, “with parallel surfaces”), from παράλληλος (parállēlos, “parallel”) + ἐπίπεδος (epípedos, “plane”).

parallelopipedon (plural parallelopipedons)

1. A parallelopiped.
   • 1806, Thomas Thomson, Annals of Philosophy:

     In the next place compare the rhombus with the parallelopipedon. It is evident the former is precisely half the area of the latter

• “parallelopipedon”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.