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/ˌhiːliːˈænθəs/ · noun
Any plant, of the genus Helianthus, having large flower heads with dark disk florets and showy yellow rays; the sunflowers.
Use helianthus when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Helianthus means Any plant, of the genus Helianthus, having large flower heads with dark disk florets and showy yellow rays; the sunflowers.
Common synonyms include sunflower.
The opposite depends on the specific sense.
Use helianthus where its definition matches the intended context.
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