Triennium

//traɪˈɛniəm// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A period of three years.

Synonyms

All synonyms
bienniumcloverleashshamrockternarythreesome

Etymology

From Latin triennium, from triennis (“3-year”) + -ium (suffix forming abstract nouns).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.