centriole
noun
cen·tri·ole ˈsen-trē-ˌōl 
: one of a pair of cellular organelles that occur especially in animals, are found near the nucleus, function in the formation of the spindle (see spindle entry 1 sense 2a) fibers during cell division, and consist of a cylinder with nine microtubules arranged peripherally in a circle see cell illustration
Example Sentences
Recent Examples on the Web Larger cells lack flagella and instead use the centrioles full time for cell division. 
Elizabeth Pennisi, Science | AAAS, 28 June 2018
Elizabeth Pennisi, Science | AAAS, 28 June 2018 Word History
Etymology
German Zentriol, from Zentrum center
First Known Use
1895, in the meaning defined above
Medical Definition
centriole
noun
cen·tri·ole ˈsen-trē-ˌōl
: one of a pair of cellular organelles that occur especially in animals, are found near the nucleus, function in the formation of the spindle apparatus during cell division, and consist of a cylinder with nine microtubules arranged peripherally in a circle