platonical
/ˌplætɒˈnɪkəl/ or /ˌplætoʊˈnɪkəl/Definitions
1. adjective
relating to or characteristic of Plato or Platonism, especially in philosophy.
“The philosopher’s ideas were distinctly platonical in nature.”
2. noun
a system or theory of philosophy based on the teachings of Plato.
“The professor’s lectures focused on Platonical theories of reality.”