Definitions
Century Dictionary and Cyclopedia
- n. A genus of amœboid protozoan organisms having a kind of carapace or shell, the type of family Arcellidæ.
GNU Webster's 1913
- n. An amoebalike protozoan with a chitinous shell resembling an umbrella.
WordNet 3.0
- n. an amoeba-like protozoan with a chitinous shell resembling an umbrella
Examples
“After from five to twenty minutes, the specific gravity of the arcella is so much lessened that it is lifted by the water with its pseudopodia, and brought up against the upper surface of the water-drop, on which it is able to travel.”
“If we bear these circumstances in mind, we can almost always tell whether an arcella will develop air-vesicles or no; and if it has already developed them, we can tell whether they will increase or diminish ...”
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