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pentecostarion

noun
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pen·​te·​cos·​ta·​ri·​on | \ -käˌ- \
plural -s

Definition of pentecostarion

: a liturgical book in the Eastern Church containing offices for the period from Easter Sunday to the first Sunday after Pentecost

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History and Etymology for pentecostarion

Late Greek pentēkostarion, from pentēkostē Pentecost

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“Pentecostarion.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/pentecostarion. Accessed 14 December 2019.

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