noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any plant in the genus Ambrosia, especially Ambrosia artemisiifolia (common ragweed).
2. 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 wordnet
3. 3
   The plant Helenium amarum (yellow sneezeweed).
4. 4
   widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States wordnet
5. 5
   Parthenium hysterophorus (false ragweed)

Show 3 more definitions

6. 6
   Artemisia tripartita subsp. tripartita (syn. Artemisia trifida; threetip sagebrush)
7. 7
   Picris rhagadioloides (syn. Picris sprengeriana; tall oxtongue)
8. 8
   Tetraneuris spp.

Synonyms

All synonyms

ambrosiabristly oxtonguebuglossfamine weedoxtongueoxtongue

Etymology

From bitter + weed.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.