sunflower Meaning, Definition & Usage

  1. noun any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays
    helianthus.

WordNet

Sun"flow`er noun
Definitions
  1. Any plant of the genus Helianthus; -- so called probably from the form and color of its flower, which is large disk with yellow rays. The commonly cultivated sunflower is Helianthus annuus, a native of America.

Webster 1913