OTHER WORDS FROM triennialtri·en·ni·al·ly, adverb
How to use triennial in a sentence
A musical festival is held triennially in aid of the general hospital.
The Convention, which was to meet triennially, entered at once upon its work.A History of American Christianity|Leonard Woolsey Bacon
The term of office is nine years, and one-third of the members retire triennially.The Governments of Europe|Frederic Austin Ogg
Representatives from the different cities met triennially at Lubeck, where their common treasury and archives were kept.Popular Technology, Vol. I (of 2)|Edward Hazen
The chief executive power is exercised by the so-called Federal Council, or Bundesgericht, which is elected triennially.