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Any of several parasitic trematode worms that infest the liver of humans and other mammals, especially Clonorchis sinensis and several species in the genus Opisthorchis, acquired from eating infected freshwater fish, and two species in the genus Fasciola, acquired from ingesting contaminated water or aquatic vegetation.
(Animals) any of various parasitic flatworms, esp Fasciola hepatica, that inhabit the bile ducts of sheep, cattle, etc, and have a complex life cycle: class Digenea. See also trematode
liv′er fluke`(ˈlɪv ər)
any of various trematodes, as Fasciola hepatica, parasitic in the liver and bile ducts of mammels.