Jerusalem artichoke

noun
Je·​ru·​sa·​lem artichoke | \jə-ˈrü-s(ə-)ləm-, -ˈrüz-ləm-, -ˈrü-zə-\

Definition of Jerusalem artichoke 

: a perennial sunflower (Helianthus tuberosus) of the U.S. and Canada widely cultivated for its tubers that are used as a vegetable and as a livestock feed also : its tubers

First Known Use of Jerusalem artichoke

1639, in the meaning defined above

History and Etymology for Jerusalem artichoke

Jerusalem by folk etymology from Italian girasole girasole

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The first known use of Jerusalem artichoke was in 1639

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