Synonyms for triennial

Synonyms for (noun) triennial

Synonyms: triennial, tercentenary, tercentennial

Definition: the 300th anniversary (or the celebration of it)

Similar words: day of remembrance, anniversary

Definition: the date on which an event occurred in some previous year (or the celebration of it)

Synonyms for (adjective) triennial

Synonyms: triennial

Definition: occurring every third year or lasting 3 years

Similar words: periodic, periodical

Definition: happening or recurring at regular intervals

Usage: the periodic appearance of the seventeen-year locust