1. (adj) biennial
(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
Antonyms: nonperiodic, perennial, annual, aperiodic, one-year
2. (adj) biennial, two-year
having a life cycle lasting two seasons
Synonyms: two-year, biennial, biyearly
Antonyms: nonperiodic, annual, one-year, aperiodic, perennial
3. (adj) biennial, biyearly
occurring every second year
Synonyms: biannual, half-yearly, two-year, biennial, semiannual, biyearly
Antonyms: annual, perennial, one-year, aperiodic, nonperiodic
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Synonyms for biennial 
