1) Cell organ 2) Organelle
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In cell biology a centriole is a cylindrical cell structure composed mainly of a protein called tubulin that is found in most eukaryotic cells. An associated pair of centrioles, surrounded by an amorphous mass of dense material, called the pericentriolar material, or PCM, makes up a compound structure called a centrosome. Centrioles are absent fro...
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http://en.wikipedia.org/wiki/Centriole
(from the article `human embryology`) The two pronuclei next approach, meet midway in the egg cytoplasm, and lose their nuclear membranes. Each resolves its diffuse chromatin material ... ...of nine double, peripherally arranged filaments (very fine threadlike structures) and a central pair of filaments in a so-called 9 + 2 pattern. A ....
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http://www.britannica.com/eb/a-z/c/45
A high magnification electron micrograph showing a centriole in transverse section. Its wall is made up of 9 sets of triplets. Each triplet is composed of 3 subunits: a, b, and c, which form a microtubule A short cylindrical organelle found in eukaryotic cells, except those of higher plants. Each...
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http://www.daviddarling.info/encyclopedia/C/centriole.html
<cell biology> They are self-replicating, short, fibrous, rod-shaped organelles of animal cells. Each centriole is a short cylinder containing nine pairs of peripheral microtubules, arranged orthogonally so as to form the wall of the cylinder. ... Almost identical to basal body of cilium. The pericentriolar material, but not the centriole its...
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http://www.encyclo.co.uk/local/20973
Organelle of animal cells that is made up of two orthogonally arranged cylinders each with nine microtubule triplets composing the wall. Almost identical to basal body of cilium. The pericentriolar material, but not the centriole itself, is the major microtubule organizing centre of the cell. Centrioles divide prior to mitosis and the daughter centrioles and their associated pericentriolar material come to lie at the poles of the spindle.
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Type: Term Pronunciation: sen′trē-ōl Definitions: 1. Tubular structures, 150 nm by 300-500 nm, with a wall having nine triple microtubules, usually seen as paired organelles lying in the cytocentrum; centrioles may be multiple and numerous in some cells, such as the giant cells of bone marrow.
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http://www.medilexicon.com/medicaldictionary.php?t=16147
A centriole is either of two rod-like bodies found in most animal cells that form the poles of the spindle during mitosis.
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http://www.probertencyclopaedia.com/browse/BC.HTM
[
n] - one of two small cylindrical cell organelles composes of 9 triplet microtubules
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http://www.webdictionary.co.uk/definition.php?query=centriole
a component of a centrosome with the structural array of nine parallel microtubules arranged in triplets; involved in eukaryotic cell division
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https://courses.lumenlearning.com/microbiology/chapter/glossary/
noun one of a pair of small cylindrical cell organelles near the nucleus in animal cells; composed of nine triplet microtubules and form the asters during mitosis
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https://www.encyclo.co.uk/local/20974
a small, cylindrical cell organelle, seen near the nucleus in the cytoplasm of most eukaryotic cells, that divides in perpendicular fashion during mitosis, the new pair of centrioles moving ahead of the spindle to opposite poles of the cell as the cell divides: identical in internal structure to a basal body. See diag. under
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https://www.infoplease.com/dictionary/centriole
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