What is the difference between centriole and centrosome?

Centrioles are present within the centrosome. The centrosome,is an organelle that serves as the main microtubule organizing center of the animal cell as well as a regulator of cell-cycle progression. Centrosomes are composed of two orthogonally arranged centrioles surrounded by an amorphous mass of protein. Each centriole is made up of a ring of nine groups of microtubules. The two centrioles are arranged such that one is perpendicular to the other.