Monera

WORDNET DICTIONARY

monera(n = noun.animal) kingdom monera, kingdom prokaryotae, prokayotae - 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; Array

is a kind of kingdom

Monera, n. pl. [NL., fr. Gr. mo`nos single.].

The lowest division of rhizopods, including those which resemble the amœbas, but are destitute of a nucleus. [1913 Webster]
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. [PJC]