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Definition of perennial noun from the Oxford Advanced Learner's Dictionary

perennial

noun
 
/pəˈreniəl/
 
/pəˈreniəl/
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  1. any plant that lives for more than two years
    • a hardy perennial
    compare annual, biennialTopics Plants and treesc2
    Word Originmid 17th cent. (in the sense ‘remaining leafy throughout the year, evergreen’): from Latin perennis ‘lasting the year through’ + -ial.
See perennial in the Oxford Advanced American Dictionary

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