circa 1586, in the meaning defined above
Greek pentarchia, from penta- + -archia -archy
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Cite this Entry
“Pentarchy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pentarchy. Accessed 7 Dec. 2021.
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Britannica.com: Encyclopedia article about pentarchy
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