Any plant, of the genus Helianthus, having large flower heads with dark disk florets and showy yellow rays; the sunflowers
Any plant of the genus Helianthus, so called probably from the form and color of its floral head, having the form of a large disk surrounded by yellow ray flowers.
Any flat, radially symmetric organic compound such as coronene
A bright yellow, like that of the flower petals.
The commonly cultivated species, Helianthus annuus, a native of America.