octennial

adjective
oc·​ten·​ni·​al | \ (ˈ)äk¦tenēəl \

Definition of octennial

1 : happening every eighth year
2 : lasting for a period of eight years

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History and Etymology for octennial

Late Latin octennium period of eight years (from Latin oct- —from octo eight—+ -ennium, from annus year) + English -al

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Dictionary Entries Near octennial

octene

octennial

octet

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Cite this Entry

“Octennial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octennial. Accessed 31 Jul. 2021.

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