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Webster 1913 Edition

Novennial

No-ven′ni-al

,

Adj.

[L.

novennis

of nine years;

novem

nine +

annus

year.]

Done or recurring every ninth year.

Webster 1828 Edition

Novennial

NO'VEN'NIAL

,

Adj.

Done every ninth year.

Definition 2024

novennial

novennial

English

Adjective

novennial ‎(not comparable)

Done or recurring every ninth year.

Synonyms

enneaeteric, enneatic