n. pl. vor·ti·cel·lae (-sĕlē) or vor·ti·cel·las
Any 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.
[New Latin Vorticella, genus name, from Latin vortex, vortic-, vortex; see VORTEX.]
(click for a larger image)vorticella
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