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novennial

Pronunciation: /nə(ʊ)ˈvɛnɪəl/

Definition of novennial

adjective

  • recurring every nine years.
  • lasting for or relating to a period of nine years.

Origin:

mid 17th century: from late Latin novennis 'nine years old' (from Latin novem 'nine') + -al

novennial in other Oxford dictionaries

Definition of novennial in the US English dictionary