Bitterweed

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Bitterweed \Bit"ter*weed`\, n. (Bot.)
     A species of {Ambrosia} ({Ambrosia artemisi[ae]folia}); Roman
     worm wood. --Gray.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:



  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}]