Ragweed definition
Any of various weeds of the genus Ambrosia of the composite family, having small, greenish, unisexual flower heads and producing abundant pollen that is one of the chief causes of hay fever.
noun
(chiefly british) Ragwort.
noun
Any of a genus (Ambrosia) of chiefly North American plants of the composite family, having tassel-like, greenish flowers which yield large amounts of wind-borne pollen, a major cause of hay fever.
noun
Any of various weeds of the genus Ambrosia of the composite family, having small, greenish, unisexual flower heads and producing abundant pollen that is one of the chief causes of hay fever.
noun
(chiefly british) Ragwort.
noun
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Other Word Forms
Noun
Singular:
ragweed
Plural:
ragweeds