Etymology of the English word triduum
the English word
triduumderived from the Latin word
triduum (three days)
derived from the Latin word
dies (day; daylight; specific day; day in question; date of letter)
derived from the Proto-Indo-European root
*dyeu-using the Latin prefix
tri-derived from the Classical Latin word
tres (three)
derived from the Proto-Indo-European root
*trei-Date
The earliest known usage of triduum in English dates from the 19th century.
Usage
Word found in Modern English