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The Collaborative International Dictionary

arcella \arcella\ n. An amoebalike protozoan with a chitinous shell resembling an umbrella.


n. an amoeba-like protozoan with a chitinous shell resembling an umbrella


Arcella is a genus of testate amoebae or Arcellinida, usually found in freshwaters and mosses, and rarely in soils. A key characteristic of Arcella is the circular test with a hole on its center from where finger-like pseudopods emerge. It is one of the largest testacean genera.

Arcella (Padua)

Arcella is the name of a district in Padua, located close to the Milan-Venice railway, north-east of the station. However, the urban expansion occurred since the 1950s made the bounds between the localities nearby imperceptible. People usually use the name "Arcella" to refer to the whole urban area north of the station.