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Noun: alligator weed  'a-lu,gey-tu(r) weed
  1. Prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses
    "Alligator weed choked the irrigation canal";
    - alligator grass, Alternanthera philoxeroides

Derived forms: alligator weeds

Type of: weed

Part of: Alternanthera, genus Alternanthera

Encyclopedia: Alligator weed