bit·ter·weed /ˈbɪtɚ/
Bit·ter·weed n. Bot. A species of Ambrosia (Ambrosia artemisiæfolia); Roman worm wood.
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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]