What is meant by Centriole ? What is it's main function?

Two organelles in cell

They are found near nucleus composed up of microtubules. They occur in pair and usually seen during cell division . Their function is to move to opposite poles during cell division and fiber thread like structures originate from them which align pull and finely divide the chromosomes into equal halves .Hope this helps thanks.http://www.madsci.org/posts/archives/2008-08/1218812179.Cb.r.html