Fluke n.
1. Zool. The European flounder. See Flounder. [Written also fleuk, flook, and flowk.]
3. Zool. A parasitic trematode worm of several species, having a flat, lanceolate body and two suckers. Two species (Fasciola hepatica and Distoma lanceolatum) are found in the livers of sheep, and produce the disease called rot.