Medical Definition of perennial
: present at all seasons of the year <perennial rhinitis>
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Dictionary: Definition of "perennial" Thesaurus: All synonyms and antonyms for "perennial" Spanish Central: Translation of "perennial" Nglish: Translation of "perennial" for Spanish speakers Britannica English: Translation of "perennial" for Arabic speakers Britannica.com: Encyclopedia article about "perennial"
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