vorticella
nounAny of various ciliate protozoans of the genus Vorticella, having a bell-shaped body and living underwater on a slender stalk often attached to a plant or other object.
nounThe typical genus of Vorticellidæ, having a retractile pedicel; the bellanimalcules.
nounAny one of numerous species of ciliated Infusoria belonging to Vorticella and many other genera of the family
any of various protozoa having a transparent goblet-shaped body with a retractile stalk