| 1. |
(adjective) (botany) having a life cycle lasting two seasons; "a biennial life cycle"; "parsnips and carrots are biennial plants often grown as annuals" |
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Synonyms: two-year |
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Antonyms: annual, perennial |
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| 2. |
(adjective) occurring every second year; "they met at biennial conventions" |
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Synonyms: biyearly |
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| 3. |
(noun) 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 |
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Related Words: flora, plant, plant life |
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