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Definition of: paramecium
(par′ə·mē′shē·əm, -sē·əm) noun plural ·ci·a (-shē·ə, -sē·ə)
A ciliate infusorian (genus Paramecium) having a flattened elongate body, and feeding by a primitive oral groove, as P. caudatum, found in stagnant water. [<NL <Gk. paramēkēs oblong, oval]
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