Vorticella

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Vorticella

(vōr'ti-sel'ă),
A genus of Ciliata of the order Peritrichida, bell-shaped, with a spiral of cilia around the adoral zone; various free-living species have been found at times in the feces, urine, and mucous discharges.
[Mod. L. dim. of L. vortex, a whorl]