zurvanism: a heretical Zoroastrian doctrine holding that Zurvan was the ultimate source of the universe and that both Ahura Mazda and Ahriman were Zurvan's offspring
heresy: a belief that rejects the orthodox tenets of a religion
emery: a hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper)