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also pro·car·y·ote  (prō-kăr′ē-ōt′)
Any of various microorganisms of the domains Archaea and Bacteria, characterized by the absence of a distinct membrane-bound nucleus and membrane-bound organelles and by the simultaneous occurrence of DNA transcription and protein synthesis at the same site, in contrast to eukaryotes. Also called moneran.

[French procaryote : Greek pro-, before; see pro-2 + Greek karuōtos, having nuts (from karuon, nut; see karyo-).]

pro·kar′y·ot′ic (-ŏt′ĭk) adj.


(prəʊˈkærɪɒt) ,




(Biology) any organism having cells in each of which the genetic material is in a single DNA chain, not enclosed in a nucleus. Bacteria and archaeans are prokaryotes. Compare eukaryote
[from pro-2 + karyo- + -ote as in zygote]
prokaryotic, procaryotic adj


or pro•car•y•ote

(proʊˈkær iˌoʊt, -i ət)

any one-celled organism that lacks a distinct membrane-bound nucleus and has its genetic material in the form of a continuous strand forming loops or coils: characteristic of monerans. Compare eukaryote.
[taken as singular of New Latin Prokaryota, earlier Procaryotes (1925); see pro-2, eukaryote]
pro•kar`y•ot′ic (-ˈɒt ɪk) adj.


Any of a wide variety of one-celled organisms that lack a distinct cell nucleus or other structures bound by a membrane and that have DNA that is not organized into chromosomes. Prokaryotes reproduce asexually, are the most primitive and ancient known forms of life, and include the bacteria and blue-green algae. Prokaryotes are grouped as a separate kingdom in taxonomy. Also called moneran. Compare eukaryote. See Table at taxonomy.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.prokaryote - 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
organism, being - a living thing that has (or can develop) the ability to act or function independently
eucaryote, eukaryote - an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells
References in periodicals archive ?
The entamoebic and giardial short fe-hydrogenase I genes appear to share a common ancestry, while the entamoebic long fe-hydrogenase 2 gene appears to have been laterally transferred from a prokaryote.
In the present study, we use the specific LPS-binding activity of LALF to localize the LPS-like molecule in eukaryotic and prokaryote cells.
Robust high-throughput prokaryote de novo assembly and improvement pipeline for Illumina data.
Virus and prokaryote enumeration from planktonic aquatic environments by epifluorescence microscopy with SYBR Green I.
12) It is thought that the Archaea, the prokaryote root of present day extremophiles, exploited the anaerobic energy of the reductive earth's core.
Further, 16S rRNA gene sequencing is one of the basic genetic markers for the characterization of prokaryote microorganism community and estimates the phylogenetic richness and classification used in the quantification and taxonomy of the microbiome including non-cultivable microorganisms (Makkar & Cameotra, 2002).
Reading Life's Engines: How Microbes Made Earth Habitable may not cause one to add a portrait of a favorite prokaryote to the family photo album, but it is fascinating to learn how microbes evolved the complex, elegant machinery inside all our cells and made life possible on Earth.
The monomer folds into five domains in a pattern conserved with the prokaryote enzymes of the GH2 family, although two long insertions in domains 2 and 3 are unique and related to oligomerization and specificity.
and the largest known prokaryote genome is over 16 times smaller (and would emit correspondingly dimmer nuclear staining) than that of the sea anemone Netnatostella vectensis (Chang et al.
Production of this protein in prokaryote cells is associated with the formation of insoluble mass and inactive form of inclusion bodies (7-9), (25), (26).
Most of our current molecular-level knowledge of biological systems was obtained using this best-characterized prokaryote.
An actinidc archaea/ viroid mediated model of prokaryote, viral, eukaryotic, primate and human evolution is discussed.