• WordNet 3.6
    • n Monera prokaryotic bacteria and blue-green algae and various primitive pathogens; because of lack of consensus on how to divide the organisms into phyla informal names are used for the major divisions
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Webster's Revised Unabridged Dictionary
    • Monera (Biol) 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.
    • n. pl Monera (Zoöl) The lowest division of rhizopods, including those which resemble the amœbas, but are destitute of a nucleus.
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Century Dictionary and Cyclopedia
    • n monera Haeckel's name of a class of protozoans of the simplest possible characters. The Monera are apparently structureless particles of protoplasm, agreeing with other rhizopods in protruding pseudopods, but differing from the normal amœboids in lacking any recognizable nucleus. Unlike foraminifers, they form no shell. The group is provisional, and perhaps hypothetical. The name is that of a legitimate biological conception; but since it is by no means certain that every moner is not a stage or state of a somewhat more definitely organized rhizopod, the group so named has no assured zoölogical standing. The Monera are sometimes nominally divided into Gymnomonera and Lepomonera, the former of which are always naked, while the latter may acquire a cell-wall. Also Monerozoa.
    • n monera [lowercase] Plural of moneron.
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Chambers's Twentieth Century Dictionary
    • Monera mō-nē′ra a class of Protozoans of the simplest characters
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. mo`nos single


In literature:

Dr. Elam next passes in review Haeckel's Geneology of Man from the Lowest Monera to his Present Station as Lord of Creation.
"The Christian Foundation, Or, Scientific and Religious Journal, Volume I, No. 8, August, 1880" by Various
This group of very simple forms includes many of Haeckel's Monera, defined as "cytodes," masses of protoplasm without a nucleus.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6" by Various
I have found some curious Monera also in the North Sea, off the Norwegian coast, near Bergen.
"The History of Creation, Vol. I (of 2)" by Ernst Haeckel
The still living Monera; 2.
"The History of Creation, Vol. II (of 2)" by Ernst Haeckel