octennial

[ ok-ten-ee-uh l ]
/ ɒkˈtɛn i əl /

adjective

occurring every eight years.
of or for eight years.

Origin of octennial

1650–60; < Late Latin octenni(um) eight-year period ( oct- oct- + -enn-, combining form of annus year + -ium -ium) + -al1

OTHER WORDS FROM octennial

oc·ten·ni·al·ly, adjective

Words nearby octennial

Example sentences from the Web for octennial

British Dictionary definitions for octennial

octennial
/ (ɒkˈtɛnɪəl) /

adjective

occurring every eight years
lasting for eight years

Derived forms of octennial

octennially, adverb

Word Origin for octennial

C17: from Latin octennium eight years, from octo eight + annus year