helianthaceous

helianthus

[hee-lee-an-thuhs]
noun, plural helianthuses.
any composite plant of the genus Helianthus, comprising the sunflowers.

Origin:
1770–80; < Neo-Latin; see heli-1, -anthous

helianthaceous [hee-lee-uhn-they-shuhs] , adjective
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World English Dictionary
helianthus (ˌhiːlɪˈænθəs)
 
n , pl -thuses
any plant of the genus Helianthus, such as the sunflower and Jerusalem artichoke, typically having large yellow daisy-like flowers with yellow, brown, or purple centres: family Asteraceae (composites)
 
[C18: New Latin, from Greek hēlios sun + anthos flower]

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