rubrician

/ruˈbrɪʃən/
noun
  1. A person who is an expert in or strictly follows the rules and directions (rubrics) for religious ceremonies or formal procedures.
    • The rubrician insisted that the priest follow every detail of the liturgy.
    • The church consulted a rubrician to ensure the ceremony was performed correctly.
    • As a rubrician, she knew exactly when to stand, kneel, or bow during the service.
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