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Noun
                                                
                        
                            echinococcus
                        
                                                
                                                    
                
                    
                    Definition: tapeworms whose larvae are parasitic in humans and domestic animals
Definition: A parasite of humans and of many domestic and wild animals, the larval stage of Echinococcus granulosus, that forms compound cysts or tumours (called hydatid cysts) in various organs, but especially in the liver and lungs.