Definition of novennial in English:

novennial

adjective

  • 1Recurring every nine years.

    1. 1.1 Lasting for or relating to a period of nine years.
      • ‘We all know what happened at the last one, but the coming one is always a biggie in the novennial cycle as it will have the election of the Presiding Bishop, the primate of the American church who serves a ten-year term.’

Origin

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

Pronunciation:

novennial

/ˌnōˈveniəl/