01 n. pl. The lowest division of rhizopods, including those which resemble the amoebas, but are destitute of a nucleus.
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1.
The lowest division of rhizopods, including those which resemble the amoebas, but are destitute of a nucleus.(Zool.) [archaic]
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2.
One of the five kingdoms of living organisms in the five-kingdom classification, consisting of microscopic usually monocellular prokaryotic organisms that mostly reproduce by asexual fission, sporulation, or budding; it includes the bacteria and cyanophytes (blue-green algae), as well as certain primitive pathogenic microbes, such as the Rickettsias.(Biol.)