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arcella

noun
ar·​cel·​la | \ärˈselə\

Definition of arcella 

1 capitalized : the type genus of Arcellidae comprising protozoans resembling amoebas and provided with a chitinous shell suggesting an umbrella

2 plural -s : a protozoan of the genus Arcella

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History and Etymology for arcella

New Latin, from Latin arca box, chest + New Latin -ella

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