Centroplasm, also known as centrosome matrix, is the central portion of the centrosome that is responsible for organizing microtubules during cell division. There are several synonyms for this term, including centriolar material, pericentriolar material, and pericentriolar matrix. These terms all refer to the same structure, a dense network of fibrous proteins that surround the centrioles. Another related term is centrosphere, which refers to the space enclosed by the centrosome matrix. This structure is essential for the correct organization of genetic material during cell division, and its dysfunction can lead to genetic disorders and cancer. Understanding the structure and function of the centroplasm is crucial for developing effective therapies for these diseases.