(sen-tree-ole) [Gk. kentron, center] A structure in an animal cell, composed of cylinders of microtubule triplets arranged in a 9 + 0 pattern. An animal cell usually has a pair of centrioles, which ar [..]

1896, from German centriol (1895), from Modern Latin centriolum, diminutive of centrum (see center (n.)).

Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope. Centrioles play a role in organizing microtubules that serve as the cell's skeletal system. They help determine the locations of the nucleus and other organelles within the cell.

Cytoplasmic organelle consisting of microtubules; present at each pole of the spindle apparatus in animal cells. © 2005 by W. H. Freeman and Company. All rights reserved. Pierce, B. Genetics: [..]

(n) 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

Either of two cylindrical structures within the centrosome of animal cells and containing nine sets of triplet microtubules; structurally similar to a basal body. (Figure 19-5b)

Self-replicating, short, fibrous, rod-shaped Organelles. Each centriole is a short cylinder containing nine pairs of peripheral Microtubules, arranged so as to form the wall of the cylinder.

A circular array of nine groups of three microtubules each found in animal cells and considered part of the cytoskeleton. Note in the Eukaryotic Cell Model

A cylinder-shaped organelle composed of microtubules and found in the nucleus of a cell. During nuclear division it forms the spindle, which ensures that the duplicated chromosomes are equally divided between the daughter cells.

A short cylindrical organelle, found in pairs arranged at right angles to each other at the centre of a microtubule organizing centre (MTOC) or centrosome, found in eukaryotes (except in higher plants [..]