Diphyllobothrium

noun

Di·​phyl·​lo·​both·​ri·​um -ˈbäth-rē-əm 

: a large genus of tapeworms that is the type genus of the family Diphyllobothriidae and that comprises a number of parasites of fish-eating birds and mammals including the fish tapeworm (D. latum) of humans compare bothriocephalus