Pronunciation: (mith'ru-iz"um), [key]
an ancient Persian religion in which Mithras was worshiped, involving secret rituals to which only men were admitted: a major competitor of Christianity in the Roman empire during the 2nd and 3rd centuriesa.d. Also,Mith•ra•i•cismPronunciation: (mith-rā'u-siz"um). [key]
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.