transcription, транскрипция: [ (ˌ)trī-ˈe-nē-əl ]
adjective
Date: 1562
1. : occurring or being done every three years
the triennial convention
2. : consisting of or lasting for three years
a triennial contract
• triennial noun
• tri·en·ni·al·ly -nē-ə-lē adverb