(n) a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma, Syn. procaryote, Ant. eukaryote
(n) 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, Syn. kingdom Monera, Prokayotae, kingdom Prokaryotae