helianthus

noun he·li·an·thus \ -an(t)thəs \

Definition of helianthus

1 capitalized :a genus of tall erect or sometimes much-branched American annual or perennial herbs (family Compositae) comprising the sunflowers and having flower heads with purple or yellow disk flowers and showy yellow sterile rays — see jerusalem artichoke
2 plural -es :any plant of the genus Helianthus

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Origin and Etymology of helianthus

New Latin, from 1heli- + -anthus


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