First Known Use: 1640
Dictionary
septennial
adjective sep·ten·ni·al \sep-ˈte-nē-əl\
Definition of SEPTENNIAL
1
: occurring or being done every seven years
2
: consisting of or lasting for seven years
— sep·ten·ni·al·ly \-ə-lē\ adverb
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Origin of SEPTENNIAL
Late Latin septennium period of seven years, from Latin septem + -ennium (as in biennium)
Rhymes with SEPTENNIAL
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