bitterweed

definition: any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
example:
speech part: noun
synonyms: ambrosia
definition: widespread European weed with spiny tongue-shaped leaves and yellow flowers
example:
speech part: noun
synonyms: oxtongue bristly oxtongue bugloss
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