Fluke \Fluke\ (fl[=u]k or fl[=oo]k), n. [Cf. AS. fl[=o]c a kind
of flatfish, Icel. fl[=o]ki a kind of halibut.]
1. (Zool.) The European flounder. See {Flounder}. [Written
also {fleuk}, {flook}, and {flowk}.]
[1913 Webster]
2. (Zool.) Any American flounder of the genus {Paralichthys},
especially {Paralicthys dentatus}, found in the Atlantic
Ocean and in adjacent bays. --RHUD
[PJC]
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.
[1913 Webster]