eukaryote


eukaryote
eukaryotic /yooh kar'ee ot"ik/, adj.
/yooh kar"ee oht', -ee euht/, n. Biol.
any organism having as its fundamental structural unit a cell type that contains specialized organelles in the cytoplasm, a membrane-bound nucleus enclosing genetic material organized into chromosomes, and an elaborate system of division by mitosis or meiosis, characteristic of all life forms except bacteria, blue-green algae, and other primitive microorganisms.
Also, eucaryote. Cf. prokaryote.
[ < NL Eukaryota, earlier Eucaryotes (1925) "those having a true nucleus," equiv. to eu- EU- + Gk káry(on) nut, kernel (see KARYO-) + NL -ota, -otes; see -OTE]

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Any organism composed of one or more cells, each of which contains a clearly defined nucleus enclosed by a membrane, along with organelles (small, self-contained, cellular parts that perform specific functions).

The organelles include mitochondria, chloroplasts, a Golgi apparatus, an endoplasmic reticulum, and lysosomes. All organisms except bacteria are eukaryotes; bacteria are prokaryotes.

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 any cell or organism that possesses a clearly defined nucleus. The eukaryotic cell has a nuclear membrane that surrounds the nucleus, in which the well-defined chromosomes (bodies containing the hereditary material) are located. Eukaryotic cells also contain organelles, including mitochondria (cellular energy exchangers), a Golgi apparatus (secretory device), an endoplasmic reticulum (a canal-like system of membranes within the cell), and lysosomes (digestive apparatus within many cell types). Compare prokaryote.

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Universalium. 2010.

Look at other dictionaries:

  • eukaryote — n. an organism with good or membrane bound nuclei having multiple chromosomes; eucaryotes also have other membrane bound organelles such as mitochondria or chloroplasts, within the cytoplasm enclosed by the outer membrane. Such cells are… …   The Collaborative International Dictionary of English

  • eukaryote — [yo͞o kar′ē ōt΄] n. [< Gr eu , good + karyōtis, a date < karyon, a nut, fruit stone, kernel] a living organism made up of cells with true nuclei that divide by mitosis: in some systems of biological classification, any of a superkingdom… …   English World dictionary

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  • eukaryote — also eucaryote noun Etymology: New Latin Eukaryotes, proposed subdivision of protists, from eu + kary + otes, plural noun suffix, from Greek ōtos more at otic Date: 1943 any of a domain (Eukarya) or a higher taxonomic group (Eukaryota) above the… …   New Collegiate Dictionary

  • Eukaryote — Eukaryota Eukaryotes …   Wikipédia en Français

  • Eukaryote — Organism whose cells have (1) chromosomes with nucleosomal structure and separated from the cytoplasm by a two membrane nuclear envelope, and (2) compartmentalisation of a function in distinct cytoplasmic organelles. Contrast Prokaryotes… …   Dictionary of molecular biology

  • eukaryote — noun Any of the single celled or multicellular organisms, of the taxonomic domain Eukaryota, whose cells contain at least one distinct nucleus. See Also: eukaryon, eukaryotic, prokaryote …   Wiktionary

  • Eukaryote — An organism that consists of one or more cells with a nucleus and other well developed compartments. People are eukaryotes. Eukaryotes include all organisms except bacteria, viruses and certain (blue green) algae which, by contrast, are… …   Medical dictionary

  • eukaryote —    A multicellular organism having true membrane bound nuclei containing chromosomes that undergo mitosis …   Forensic science glossary

  • eukaryote — n. organism made up of cells that have cell organelles and nuclei with chromosomes (characteristic of all cells except for bacteria and other very primitive life forms) …   English contemporary dictionary


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