Also found in: Thesaurus, Wikipedia.
Related to alligator weed: Alternanthera philoxeroides
An aquatic South American perennial plant (Alternanthera philoxeroides) having opposite, lance-shaped leaves and small whitish flowers. It is a weed that invades warm, freshwater habitats in the southeast United States, Australia, and elsewhere.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Switch to new thesaurus
|Noun||1.||alligator weed - prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses|
Alternanthera, genus Alternanthera - genus of low herbs of tropical America and Australia; includes genus Telanthera
weed - any plant that crowds out cultivated plants
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.