giant sunflower

/ˌdʒaɪənt ˌsʌnˈflaʊər/
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Other forms: giant sunflowers

Definitions of giant sunflower
  1. noun
    very tall American perennial of central and the eastern United States to Canada having edible tuberous roots
    synonyms: Helianthus giganteus, Indian potato, tall sunflower
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    type of:
    helianthus, sunflower
    any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays
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