officiant
of·fi·ciant
noun
Origin
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”).
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Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.