See also: tri-annual

English

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Etymology

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tri- +‎ annual

Adjective

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triannual (not comparable)

  1. Happening three times each year.

Usage notes

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  • To avoid confusion between "triennial," once every three years, and "triannual," three times in one year, it is often better to substitute a less ambiguous phrase such as "three times a year" or "every four months."

Translations

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See also

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  • triennial (every three years) which is sometimes confused with triannual (usually every four months).
  • biennial (every two years).
  • biannual (twice a year).