fluke

n 1: a stroke of luck [syn: {good luck}, {good fortune}]

2: a barb on a harpoon or arrow

3: flat blade-like projection on the arm of an anchor [syn: {flue}]

4: either of the two lobes of the tail of a cetacean

5: parasitic flatworms having external suckers for attaching to

a host [syn: {trematode}]