arcella
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Related to arcella: paramecium, vorticella
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| Noun | 1. | arcella - an amoeba-like protozoan with a chitinous shell resembling an umbrellaprotozoan, protozoon - any of diverse minute acellular or unicellular organisms usually nonphotosynthetic genus Arcella - type genus of the Arcellidae |
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arcella - an amoeba-like protozoan with a chitinous shell resembling an umbrella