A priest or official who performs religious duties or services for a period of one week; a member of a rotating weekly service.
From Medieval Latin 'hebdomadarius,' from 'hebdomada' (week). Established in ecclesiastical practice and terminology by the 12th century.
This word reveals how the medieval church was an incredibly organized institution with precise terminology for every role—they had a special word for 'the person whose turn it is this week.'
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