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common ragweed
DEFINITIONS OF:
common ragweed
1
n
annual weed with finely divided foliage and spikes of green flowers; common in North America; introduced elsewhere accidentally
Synonyms:
Ambrosia artemisiifolia
Type of:
ambrosia
,
bitterweed
,
ragweed
any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
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