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Từ điển Oxford Learners Wordfinder Dictionary
bitterweed


noun
1. widespread European weed with spiny tongue-shaped leaves and yellow flowers;
naturalized in United States
Syn:
oxtongue, bristly oxtongue, bugloss, Picris echioides
Hypernyms:
weed
Member Holonyms:
Picris, genus Picris
2. any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
Syn:
ragweed, ambrosia
Hypernyms:
weed
Hyponyms:
common ragweed, Ambrosia artemisiifolia, great ragweed, Ambrosia trifida, western ragweed,
perennial ragweed, Ambrosia psilostachya
Member Holonyms:
genus Ambrosia


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