fluke
1. fluke \'flu:k\ n [ME, fr. OE flo-c; akin to OHG flah smooth - more at FLAKE)M 1: FLATFISH 2: a flattened digenetic trematode worm; broadly : TREMATODE 2. fluke n [perh. fr. 1fluke] 1: the part of an anchor that fastens in the ground 2: a barbed head (as of a harpoon) 3: one of the lobes of a whale's tail 3. fluke n [origin unknown] 1: an accidentally successful stroke at billiards or pool 2: a stroke of luck