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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 bit·ter·weed /ˈbɪtɚ/

From: Webster's Revised Unabridged Dictionary (1913)

 Bit·ter·weed n. Bot. A species of Ambrosia (Ambrosia artemisiæfolia); Roman worm wood.
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From: WordNet (r) 2.0

 bitterweed
      n 1: widespread European weed with spiny tongue-shaped leaves and
           yellow flowers; naturalized in United States [syn: oxtongue,
            bristly oxtongue, bugloss, Picris echioides]
      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]