septennium

septennium

(sɛpˈtɛnɪəm)
n, pl -niums or -nia (-nɪə)
a period or cycle of seven years
[C19: from Latin, from septem seven + -ennium, from annus year]
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References in periodicals archive ?
Umberto Cassuto noted that many of the ages of the Patriarchs were either exact multiples of 5 or else multiples of five with the addition of seven (one number, the years of Mathuselah's life, was twice augmented by seven, one septennium having been added to his age when his eldest son was born, and another to the remaining years of his life).
Il trattato ginecologico-pediatrico in volgare: Ad mulieres ferrarienses de regimine pregnantium et noviter natorum usque ad septennium.