FLUKE

I. noun see: floor Date: before 12th century flatfish , a flattened digenetic trematode worm, II. noun Etymology: perhaps from 1~ Date: 1561 the part of an anchor that fastens in the ground, one of the lobes of a whale's tail, III. noun Etymology: origin unknown Date: 1857 an accidentally successful stroke at billiards or pool, a stroke of luck