triduan

Lasting three days.

It seems to be a kind of understanding or unwritten compact between the orator and the audience, that he be allowed to talk without interruption as much as he pleases, so long as they are not called upon to listen to one word that he utters. Accordingly, during the delivery of one of these triduan discourses, the Senate of the United States wears the appearance of an orderly well-regulated reading-room; the members being comfortably seated in their arm-chairs, some looking over and answering private letters, some exchanging a few words in a low whisper with each other, or with friends in the strangers' gallery, others reading a newspaper, and all evincing the most philosophic indifference to the tedious harangue and the exhaustless lungs of the orator.

These Litanies are also called Rogations, and Gang Days among the Saxons, and Gang Dawes by old English writers. They are triduan, and take place on the three days before Ascension Day.

Happening every third day.

1810 January—June, The Universal Magazine, New Series, Volume XIII, page 103, The diurnal or triduan prints are too expensive for every individual, and in consequence the weekly ones have been established; […] .

An event lasting three days.

Pius IX has defined the sacred dogma, and the Catholic world has rejoiced, and Triduans, that is, three days of special joy and holy exercises, have been celebrated throughout the wide world, and continue to be celebrated in honor of the glad event.

Then they lift their hands up to heaven, and they give a blessing to God and Patrick with the saints of Ireland, and to every soul that is in the assembly of these triduans, whether alone or in a multitude.