As a suffix 'tych' (pronounced 'tic') refers to multiple related/connected things ... tables, leaves, panels, works ... (diptych, triptych, polyptych). EG 'trip

As a suffix 'tych' (pronounced 'tic') refers to multiple related/connected things ... tables, leaves, panels, works ... (diptych, triptych, polyptych). EG 'triptych' "derives from the Greek adjective τρίπτυχον 'triptukhon' ('three-fold')". 'Ptychography' was coined by crystallographers in 1972. Wikipedia has more on the origin. https://en.wikipedia.org/wiki/Ptychography https://en.wikipedia.org/wiki/Ptychography