from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An aquatic South American perennial plant (Alternanthera philoxeroides) having opposite, lance-shaped leaves and tight clusters of small whitish flowers. It is a mat-forming weed in warm, freshwater habitats, such as the southeast United States.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses
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