Prokaryote
WordNet
noun
(1) 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
WiktionaryText
Etymology
From pro- + + -ote.
Noun
- an organism characterized by the absence of a nuclear membrane and by DNA that is not organized into chromosomes.
- in the two-empire system of biological taxonomy, an organism of the kingdom Prokaryotae (now superseded).