variants:
or less commonly ameba
Definition of amoeba
: any of a large genus (Amoeba) of naked rhizopod protozoans with lobed and never anastomosing pseudopodia, without permanent organelles or supporting structures, and of wide distribution in fresh and salt water and moist terrestrial environments
broadly
: a naked rhizopod or other amoeboid protozoan
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Merriam-Webster unabridged
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Time Traveler for amoeba
The first known use of amoeba was in 1822
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