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triennium

[ trahy-en-ee-uhm ]
/ tra瑟藞蓻n i 蓹m /
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noun, plural tri路en路ni路ums, tri路en路ni路a [trahy-en-ee-uh]. /tra瑟藞蓻n i 蓹/.
a period of three years.
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Origin of triennium

1840鈥50; <Latin: period of three years, equivalent to trienn(is) pertaining to three years (tri-tri- + -enn-, combining form of annus year + -is adj. suffix) + -ium-ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, 漏 Random House, Inc. 2022

How to use triennium in a sentence

British Dictionary definitions for triennium

triennium
/ (tra瑟藞蓻n瑟蓹m) /

noun plural -niums or -nia (-n瑟蓹)
a period or cycle of three years

Word Origin for triennium

C19: from Latin, from tri- + annus a year
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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