alligator weed

1 definition found

alligator weed - WordNet (r) 2.1 (2005) :

  alligator weed
      n 1: prolific South American aquatic weed having grasslike
           leaves and short spikes of white flowers; clogs waterways
           with dense floating masses [syn: alligator weed,
           alligator grass, Alternanthera philoxeroides]