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Medical Definition of Diphyllobothrium latum
1. The broad or broad fish tapeworm, a species that causes diphyllobothriasis, found in man and fish-eating mammals in many parts of northern Europe, Japan and elsewhere in Asia, and in Scandinavian populations of the American north central states; it often has 3 or 4 thousand segments, broader than long; the head has typical bothria characteristic of the genus. Synonym: Dibothriocephalus latus. (05 Mar 2000)