quinquennial

Adjective, Noun

quin=quen=ni=al

CIDE DICTIONARY

quinquennial, a. [L. quinquennalis and quinquennis; quinque five + annus year. See Five, and cf. Biennial.].

Occurring once in five years, or at the end of every five years; also, lasting five years. A quinquennial event. [1913 Webster]

quinquennial, adj.
1 lasting five years.
2 recurring every five years.

Derivative

quinquennially adv.

Etymology

L quinquennis (as QUINQUENNIUM)

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