Co·per·ni·can (kō-pûr'nĭ-kən, kə-) adj. Of or relating to the theory of Copernicus that Earth rotates daily on its axis and, with the other planets in the solar system, revolves around the sun.
1667, from Copernicus, L. form of Mikolaj Koppernigk (1473-1543), physician and canon of the cathedral of Frauenburg. His great work was "De Revolutionibus Orbium Coelestium."