Search Result for "oxbow lake":
Wordnet 3.0

NOUN (1)

1. a crescent-shaped lake (often temporary) that is formed when a meander of a river is cut off from the main channel; 



WordNet (r) 3.0 (2006):

oxbow lake
    n 1: a crescent-shaped lake (often temporary) that is formed
         when a meander of a river is cut off from the main channel