echinococcus: tapeworms whose larvae are parasitic in humans and domestic animals
tapeworm: ribbonlike flatworms that are parasitic in the intestines of humans and other vertebrates
potlatch: a ceremonial feast held by some Indians of the northwestern coast of North America (as in celebrating a marriage or a new accession) in which the host gives gifts to tribesmen and others to display his superior wealth (sometimes, formerly, to his own impoverishment)