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Definition of Biennial
1. Noun. (botany) a plant having a life cycle that normally takes two seasons from germination to death to complete; flowering biennials usually bloom and fruit in the second season.
2. Adjective. Having a life cycle lasting two seasons. "Parsnips and carrots are biennial plants often grown as annuals"
3. Adjective. Occurring every second year. "They met at biennial conventions"
Definition of Biennial
1. a. Happening, or taking place, once in two years; as, a biennial election.
2. n. Something which takes place or appears once in two years; esp. a biennial examination.
Definition of Biennial
1. an event that occurs every two years [n -S]
Medical Definition of Biennial
1. A plant whose life cycle extends for more than one but less than two years after germination. (09 Oct 1997)