The larval form of the diphyllobothriid tapeworms of the genus diphyllobothrium and spirometra. Fish-eating mammals and man are the final hosts. ... (12 Dec 1998) ... 
(spahr´gә-nәm) a migrating larva of a tapeworm; see also sparganosis.
Type: Term Pronunciation: spar′gă-nŭm Definitions: 1. Originally described as a genus, but now restricted to the plerocercoid stage of certain tapeworms.