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septennium

/ (sɛpˈtɛnɪəm) /
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noun plural -niums or -nia (-nɪə)

a period or cycle of seven years

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Word Origin for septennium

C19: from Latin, from septem seven + -ennium, from annus year
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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