Chrism (Greek word literally meaning "an anointing"), also called "myrrh" (myron), holy anointing oil, or "consecrated oil", is a consecrated oil used in the Roman Catholic, Eastern Orthodox, Anglican, Eastern Rite Catholic, Oriental Orthodox, and Old-Catholic churches, as well as some other traditions, including the Assyrian Church of the East, and Nordic-style Lutheran churches, in the administration of certain sacraments and ecclesiastical functions.
Pure or scented olive oil, although typically not called chrism today, has been called chrism in the past, including oil used by Protestants in some forms of Baptism, Confirmation, Anointing of the Sick and foot washing. In The Church of Jesus Christ of Latter-day Saints (LDS Church), consecrated oil is used in some ordinances.
Read more about Chrism: Early Christian Usage, Etymology, Roman Catholicism, Eastern Christianity, Anglicanism and Lutheranism, Latter-day Saints