novennial

== English == === Etymology === From novennium (“9-year period”) + -al, q.v. === Adjective === novennial (not comparable) Of or relating to a 9-year period. ==== Synonyms ==== enneaeteric, enneatic === References === “novennial, adj.”, in OED Online ⁠, Oxford: Oxford University Press, 2022. “novennial”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.