officiant means A person who officiates at a religious ceremony (in Christianity, at any ceremony other than the Eucharist). Lexicurio rates it Sui generis — a strength score of 88 out of 100.
officiant is pronounced /əˈfɪʃi.ənt/.
Etymology
From Medieval Latin officiāns, present participle of officiō, officiāre (“to perform a duty or service”) (not to be confused with Classical officiō, officere (“to obstruct, hinder”)), a denominal verb from officium (“duty, service”).
noun
- A person who officiates at a religious ceremony (in Christianity, at any ceremony other than the Eucharist).“There are moments in a witchcraft ceremony when a god is believed to enter the body of the officiant.”
- A person who officiates at a civil (non-religious) wedding ceremony.