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tri·er·arch | \ ˈtrī(-ə)-ˌrärk 
\
\Definition of trierarch
1 : the commander of a trireme
2 : an Athenian citizen who had to fit out a trireme for the public service
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Merriam-Webster unabridgedWords at Play
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Time Traveler for trierarch
The first known use of trierarch was circa 1656
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