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Eukaryote: An organism that consists of one or more cells each of which has a nucleus and other well-developed intracellular compartments. Eukaryotes include all organisms except bacteria, viruses, and certain (blue-green) algae which, by contrast, are prokaryotes.See: Prokaryote.ukaryote means true nucleus. Eukaryotic organisms also have other specialized structures, called organelles, which are small structures within cells that perform dedicated functions. As the name implies, you can think of organelles as small organs.
A prokaryote is a cell without a nucleus and eukaryotes are cells that contain nuclei. There's one quick test to distinguish prokaryotes from eukaryotes: if you can see a single organism, it's a eukaryote.ust about every organism you're familiar with is a eukaryote. Single celled organisms like yeast, paramecia and amoebae are all eukaryotes. Grass, potatoes, and pine trees are all eukaryotes, as are algae, mushrooms, and tapeworms. And, of course, moles, fruit flies, and you are also examples of eukaryotes.