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Biennial

a plant whose life cycle extends for more than one but less than two years after germination. Having a life cycle lasting two seasons; a biennial life cycle; parsnips and carrots are biennial plants often grown as annuals.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.Occurring every second year; they met at biennial conventions.Compare to annual, which means once a year, biennial pertains to occurrences spanning over 2 years.