quindecennial

Fetched 2026-10-26 (cache).

Synonyms: undecennial

Antonyms: undecennial

Related words from Datamuse; suggestions, not definitions.

Adjective

1. Lasting [[fifteen]] years.
2. Happening once in fifteen years.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.