Definitions

from The Century Dictionary.

  • noun A name given to American species of ragweed, Ambrosia artemisiæfolia and A. trifida.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Bot.) A species of Ambrosia (Ambrosia artemisiæfolia); Roman worm wood.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Any plant in the genus Ambrosia, especially Ambrosia artemisiifolia.
  • noun The plant Artemisia trifida.
  • noun The plant Helenium amarum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States
  • noun any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

bitter +‎ weed

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Examples

  • hundreds of thousands of wisconsin union membership residents would be happy to donate. where would you like the checks sent? bitterweed wrote:

    Reuters: Press Release 2011

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