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triennially
Adverb
Meaning
Once in three years.
Source: Webster's dictionary
Synonyms
biennially
every three years
every other year
every sixth year
every fifth year
every third year subsequently
every fourth year
every third year thereafter
every three-year event
every three-year happening
every three-year instance
every three-year interval
every second or third year
every three-year occasion
every three years thereafter
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Close letter words and terms
trielemental
triene
triennial
triennium
trienoic
triens