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WordNet-Online 
 Definitions from WordNet
Adjective triennial has 1 sense 
Noun triennial has 1 sense 
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| Definitions from the WebTriennialDefinition: Triennial refers to something that occurs or is being done once every three years. Part of Speech: Adjective, noun Senses: 
 Examples: 
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| tridymite triebwasser tried-and-true tried tried and true tried level best tried my hand trien triennial trier tries triethanolamide triethanolamine trifecta triffin triffle triffles 
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